fix: replace use of type guards with boolean return type

The type narrowing behavior of type guards makes only sense when the
runtime checks match the type guards. For example `value is string`
should be used with `typeof value === 'string'` and not with a function
that checks for whether a value is a snakecase string. In the latter
case, the type guard would incorrectly narrow the type of the value to
`never` for a string that is not snakecase.

lib/node_modules/@stdlib/assert/is-array-length/docs/types/index.d.ts

@@ -36,7 +36,7 @@
 * var bool = isArrayLength( 3.14 );
 * // returns false
 */
-declare function isArrayLength( value: any ): value is number;
+declare function isArrayLength( value: any ): boolean;
 
 
 // EXPORTS //

lib/node_modules/@stdlib/assert/is-between/docs/types/index.d.ts

@@ -57,7 +57,7 @@ type Comparison = 'open' | 'closed';
 * var bool = isBetween( 3.14, 3.0, 3.14, 'closed', 'open' );
 * // returns false
 */
-declare function isBetween( value: any, a: any, b: any, left?: Comparison, right?: Comparison ): value is number;
+declare function isBetween( value: any, a: any, b: any, left?: Comparison, right?: Comparison ): boolean;
 
 
 // EXPORTS //

lib/node_modules/@stdlib/assert/is-composite/docs/types/index.d.ts

@@ -48,7 +48,7 @@ interface IsComposite {
 	* var bool = isComposite( null );
 	* // returns false
 	*/
-	( value: any ): value is number | Number;
+	( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number primitive having a value which is a composite number.
@@ -64,7 +64,7 @@ interface IsComposite {
 	* var bool = isComposite.isPrimitive( new Number( 4.0 ) );
 	* // returns false
 	*/
-	isPrimitive( value: any ): value is number;
+	isPrimitive( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number object having a value which is a composite number.
@@ -80,7 +80,7 @@ interface IsComposite {
 	* var bool = isComposite.isObject( new Number( 4.0 ) );
 	* // returns true
 	*/
-	isObject( value: any ): value is Number;
+	isObject( value: any ): boolean;
 }
 
 /**

lib/node_modules/@stdlib/assert/is-cube-number/docs/types/index.d.ts

@@ -48,7 +48,7 @@ interface IsCubeNumber {
 	* var bool = isCubeNumber( null );
 	* // returns false
 	*/
-	( value: any ): value is number | Number;
+	( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number primitive having a value which is a cube number.
@@ -64,7 +64,7 @@ interface IsCubeNumber {
 	* var bool = isCubeNumber.isPrimitive( new Number( 8.0 ) );
 	* // returns false
 	*/
-	isPrimitive( value: any ): value is number;
+	isPrimitive( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number object having a value which is a cube number.
@@ -80,7 +80,7 @@ interface IsCubeNumber {
 	* var bool = isCubeNumber.isObject( new Number( 8.0 ) );
 	* // returns true
 	*/
-	isObject( value: any ): value is Number;
+	isObject( value: any ): boolean;
 }
 
 /**

lib/node_modules/@stdlib/assert/is-even/docs/types/index.d.ts

@@ -52,7 +52,7 @@ interface IsEven {
 	* var bool = isEven( null );
 	* // returns false
 	*/
-	( value: any ): value is number | Number;
+	( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number primitive that is an even number.
@@ -68,7 +68,7 @@ interface IsEven {
 	* var bool = isEven.isPrimitive( new Number( -4.0 ) );
 	* // returns false
 	*/
-	isPrimitive( value: any ): value is number;
+	isPrimitive( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number object that is an even number.
@@ -84,7 +84,7 @@ interface IsEven {
 	* var bool = isEven.isObject( new Number( 4.0 ) );
 	* // returns true
 	*/
-	isObject( value: any ): value is Number;
+	isObject( value: any ): boolean;
 }
 
 /**

lib/node_modules/@stdlib/assert/is-finite/docs/types/index.d.ts

@@ -44,7 +44,7 @@ interface IsFinite {
 	* var bool = isFinite( null );
 	* // returns false
 	*/
-	( value: any ): value is number | Number;
+	( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number primitive having a finite value.
@@ -60,7 +60,7 @@ interface IsFinite {
 	* var bool = isFinite.isPrimitive( new Number( -3.0 ) );
 	* // returns false
 	*/
-	isPrimitive( value: any ): value is number;
+	isPrimitive( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number object having a finite value.
@@ -76,7 +76,7 @@ interface IsFinite {
 	* var bool = isFinite.isObject( new Number( 3.0 ) );
 	* // returns true
 	*/
-	isObject( value: any ): value is Number;
+	isObject( value: any ): boolean;
 }
 
 /**

lib/node_modules/@stdlib/assert/is-infinite/docs/types/index.d.ts

@@ -44,7 +44,7 @@ interface IsInfinite {
 	* var bool = isInfinite( null );
 	* // returns false
 	*/
-	( value: any ): value is number | Number;
+	( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number primitive having an infinite value.
@@ -60,7 +60,7 @@ interface IsInfinite {
 	* var bool = isInfinite.isPrimitive( new Number( -1.0/0.0 ) );
 	* // returns false
 	*/
-	isPrimitive( value: any ): value is number;
+	isPrimitive( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number object having an infinite value.
@@ -76,7 +76,7 @@ interface IsInfinite {
 	* var bool = isInfinite.isObject( new Number( 1.0/0.0 ) );
 	* // returns true
 	*/
-	isObject( value: any ): value is Number;
+	isObject( value: any ): boolean;
 }
 
 /**

lib/node_modules/@stdlib/assert/is-integer/docs/types/index.d.ts

@@ -44,7 +44,7 @@ interface IsInteger {
 	* var bool = isInteger( null );
 	* // returns false
 	*/
-	( value: any ): value is number | Number;
+	( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number primitive having an integer value.
@@ -60,7 +60,7 @@ interface IsInteger {
 	* var bool = isInteger.isPrimitive( new Number( -3.0 ) );
 	* // returns false
 	*/
-	isPrimitive( value: any ): value is number;
+	isPrimitive( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number object having an integer value.
@@ -76,7 +76,7 @@ interface IsInteger {
 	* var bool = isInteger.isObject( new Number( 3.0 ) );
 	* // returns true
 	*/
-	isObject( value: any ): value is Number;
+	isObject( value: any ): boolean;
 }
 
 /**

lib/node_modules/@stdlib/assert/is-nan/docs/types/index.d.ts

@@ -44,7 +44,7 @@ interface IsNaN {
 	* var bool = isnan( null );
 	* // returns false
 	*/
-	( value: any ): value is number | Number;
+	( value: any ): boolean;
 
 	/**
 	* Tests if a value is a `NaN` number primitive.
@@ -64,7 +64,7 @@ interface IsNaN {
 	* var bool = isnan.isPrimitive( new Number( NaN ) );
 	* // returns false
 	*/
-	isPrimitive( value: any ): value is number;
+	isPrimitive( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number object having a value of `NaN`.
@@ -80,7 +80,7 @@ interface IsNaN {
 	* var bool = isnan.isObject( new Number( NaN ) );
 	* // returns true
 	*/
-	isObject( value: any ): value is Number;
+	isObject( value: any ): boolean;
 }
 
 /**

lib/node_modules/@stdlib/assert/is-negative-finite/docs/types/index.d.ts

@@ -52,7 +52,7 @@ interface isNegativeFinite {
 	* var bool = isNegativeFinite( -1.0/0.0 );
 	* // returns false
 	*/
-	( value: number | Number ): value is number | Number;
+	( value: number | Number ): boolean;
 
 	/**
 	* Tests if a value is a number primitive having a finite negative value.
@@ -68,7 +68,7 @@ interface isNegativeFinite {
 	* var bool = isNegativeFinite.isPrimitive( new Number( -3.0 ) );
 	* // returns false
 	*/
-	isPrimitive( value: number | Number ): value is number;
+	isPrimitive( value: number | Number ): boolean;
 
 	/**
 	* Tests if a value is a number object having a negative value.
@@ -84,7 +84,7 @@ interface isNegativeFinite {
 	* var bool = isNegativeFinite.isObject( new Number( -3.0 ) );
 	* // returns true
 	*/
-	isObject( value: number | Number ): value is Number;
+	isObject( value: number | Number ): boolean;
 }
 
 /**

lib/node_modules/@stdlib/assert/is-negative-integer/docs/types/index.d.ts

@@ -48,7 +48,7 @@ interface IsNegativeInteger {
 	* var bool = isNegativeInteger( null );
 	* // returns false
 	*/
-	( value: any ): value is number | Number;
+	( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number primitive having a negative integer value.
@@ -64,7 +64,7 @@ interface IsNegativeInteger {
 	* var bool = isNegativeInteger.isPrimitive( new Number( -3.0 ) );
 	* // returns false
 	*/
-	isPrimitive( value: any ): value is number;
+	isPrimitive( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number object having a negative integer value.
@@ -80,7 +80,7 @@ interface IsNegativeInteger {
 	* var bool = isNegativeInteger.isObject( new Number( -3.0 ) );
 	* // returns true
 	*/
-	isObject( value: any ): value is Number;
+	isObject( value: any ): boolean;
 }
 
 /**

lib/node_modules/@stdlib/assert/is-negative-number/docs/types/index.d.ts

@@ -48,7 +48,7 @@ interface IsNegativeNumber {
 	* var bool = isNegativeNumber( null );
 	* // returns false
 	*/
-	( value: any ): value is number | Number;
+	( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number primitive having a negative value.
@@ -64,7 +64,7 @@ interface IsNegativeNumber {
 	* var bool = isNegativeNumber.isPrimitive( new Number( -3.0 ) );
 	* // returns false
 	*/
-	isPrimitive( value: any ): value is number;
+	isPrimitive( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number object having a negative value.
@@ -80,7 +80,7 @@ interface IsNegativeNumber {
 	* var bool = isNegativeNumber.isObject( new Number( -3.0 ) );
 	* // returns true
 	*/
-	isObject( value: any ): value is Number;
+	isObject( value: any ): boolean;
 }
 
 /**

lib/node_modules/@stdlib/assert/is-negative-zero/docs/types/index.d.ts

@@ -52,7 +52,7 @@ interface IsNegativeZero {
 	* var bool = isNegativeZero( null );
 	* // returns false
 	*/
-	( value: any ): value is number | Number;
+	( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number primitive equal to negative zero.
@@ -68,7 +68,7 @@ interface IsNegativeZero {
 	* var bool = isNegativeZero.isPrimitive( new Number( -0.0 ) );
 	* // returns false
 	*/
-	isPrimitive( value: any ): value is number;
+	isPrimitive( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number object having a value equal to negative zero.
@@ -84,7 +84,7 @@ interface IsNegativeZero {
 	* var bool = isNegativeZero.isObject( new Number( -0.0 ) );
 	* // returns true
 	*/
-	isObject( value: any ): value is Number;
+	isObject( value: any ): boolean;
 }
 
 /**

lib/node_modules/@stdlib/assert/is-nonnegative-finite/docs/types/index.d.ts

@@ -52,7 +52,7 @@ interface IsNonNegativeFinite {
 	* var bool = isNonNegativeFinite( null );
 	* // returns false
 	*/
-	( value: any ): value is number | Number;
+	( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number primitive having a nonnegative finite value.
@@ -76,7 +76,7 @@ interface IsNonNegativeFinite {
 	* var bool = isNonNegativeFinite( 1.0/0.0 );
 	* // returns false
 	*/
-	isPrimitive( value: any ): value is number;
+	isPrimitive( value: any ): boolean;
 
 	/**
 	* Tests if a value is a finite number object having a nonnegative value.
@@ -100,7 +100,7 @@ interface IsNonNegativeFinite {
 	* var bool = isNonNegativeFinite( 1.0/0.0 );
 	* // returns false
 	*/
-	isObject( value: any ): value is Number;
+	isObject( value: any ): boolean;
 }
 
 /**

lib/node_modules/@stdlib/assert/is-nonnegative-integer/docs/types/index.d.ts

@@ -48,7 +48,7 @@ interface IsNonNegativeInteger {
 	* var bool = isNonNegativeInteger( null );
 	* // returns false
 	*/
-	( value: any ): value is number | Number;
+	( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number primitive having a nonnegative integer value.
@@ -64,7 +64,7 @@ interface IsNonNegativeInteger {
 	* var bool = isNonNegativeInteger.isPrimitive( new Number( 3.0 ) );
 	* // returns false
 	*/
-	isPrimitive( value: any ): value is number;
+	isPrimitive( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number object having a nonnegative integer value.
@@ -80,7 +80,7 @@ interface IsNonNegativeInteger {
 	* var bool = isNonNegativeInteger.isObject( new Number( 3.0 ) );
 	* // returns true
 	*/
-	isObject( value: any ): value is Number;
+	isObject( value: any ): boolean;
 }
 
 /**

lib/node_modules/@stdlib/assert/is-nonnegative-number/docs/types/index.d.ts

@@ -48,7 +48,7 @@ interface IsNonNegativeNumber {
 	* var bool = isNonNegativeNumber( null );
 	* // returns false
 	*/
-	( value: any ): value is number | Number;
+	( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number primitive having a nonnegative value.
@@ -64,7 +64,7 @@ interface IsNonNegativeNumber {
 	* var bool = isNonNegativeNumber.isPrimitive( new Number( 3.0 ) );
 	* // returns false
 	*/
-	isPrimitive( value: any ): value is number;
+	isPrimitive( value: any ): boolean;
 
 	/**
 	* Tests if a value is a number object having a nonnegative value.
@@ -80,7 +80,7 @@ interface IsNonNegativeNumber {
 	* var bool = isNonNegativeNumber.isObject( new Number( 3.0 ) );
 	* // returns true
 	*/
-	isObject( value: any ): value is Number;
+	isObject( value: any ): boolean;
 }
 
 /**