Require Node.js 8 and upgrade dependencies

.gitattributes

@@ -1,2 +1 @@
-* text=auto
-*.js text eol=lf
+* text=auto eol=lf

.travis.yml

@@ -1,5 +1,5 @@
 language: node_js
 node_js:
+  - '12'
   - '10'
   - '8'
-  - '6'

gruntfile.js

@@ -1,4 +1,5 @@
 'use strict';
+
 module.exports = grunt => {
 	require('.')(grunt, {
 		pattern: ['grunt*'],

index.js

@@ -19,16 +19,16 @@ module.exports = (grunt, options = {}) => {
 
 	pattern.push('!grunt', '!grunt-cli');
 
-	const names = scope.reduce((result, prop) => {
-		const deps = config[prop] || [];
-		return result.concat(Array.isArray(deps) ? deps : Object.keys(deps));
+	const names = scope.reduce((result, property) => {
+		const dependencies = config[property] || [];
+		return result.concat(Array.isArray(dependencies) ? dependencies : Object.keys(dependencies));
 	}, []);
 
 	for (const packageName of multimatch(names, pattern)) {
 		if (options.requireResolution === true) {
 			try {
 				grunt.loadTasks(resolvePkg(path.join(packageName, 'tasks'), {cwd}));
-			} catch (err) {
+			} catch (_) {
 				grunt.log.error(`npm package \`${packageName}\` not found. Is it installed?`);
 			}
 		} else {

package.json

@@ -10,7 +10,7 @@
 		"url": "sindresorhus.com"
 	},
 	"engines": {
-		"node": ">=6"
+		"node": ">=8"
 	},
 	"scripts": {
 		"test": "xo && grunt"
@@ -30,16 +30,16 @@
 		"tasks"
 	],
 	"dependencies": {
-		"arrify": "^1.0.0",
-		"multimatch": "^2.0.0",
-		"pkg-up": "^2.0.0",
-		"resolve-pkg": "^1.0.0"
+		"arrify": "^2.0.1",
+		"multimatch": "^4.0.0",
+		"pkg-up": "^3.1.0",
+		"resolve-pkg": "^2.0.0"
 	},
 	"devDependencies": {
 		"grunt": "^1.0.1",
 		"grunt-cli": "^1.2.0",
-		"grunt-svgmin": "^5.0.0",
-		"xo": "*"
+		"grunt-svgmin": "^6.0.0",
+		"xo": "^0.24.0"
 	},
 	"peerDependencies": {
 		"grunt": ">=1"