fix: use isNaN check in isValidDate (#10)

Co-authored-by: Aras Abbasi <a.abbasi@cognigy.com>

src/utils/isValidDate.ts

@@ -1,6 +1,4 @@
 export function isValidDate(date: unknown): date is Date {
-	// An invalid date object returns NaN for getTime() and NaN is the only
-	// object not strictly equal to itself.
-	// eslint-disable-next-line no-self-compare
-	return date !== null && new Date(date as string).getTime() === new Date(date as string).getTime();
+	// An invalid date object returns NaN for getTime()
+	return date !== null && Number.isNaN(new Date(date as string).getTime()) === false;
 }

src/utils/nextRunAt.ts

@@ -19,8 +19,7 @@ const dateForTimezone = (timezoneDate: Date, timezone?: string): moment.Moment =
 
 export function isValidHumanInterval(value: unknown): value is string {
 	const transformedValue = humanInterval(value as string);
-	// eslint-disable-next-line no-restricted-globals
-	return typeof transformedValue === 'number' && isNaN(transformedValue) === false;
+	return typeof transformedValue === 'number' && Number.isNaN(transformedValue) === false;
 }
 
 /**