Upgrade to ESLint 6

Fixes #390

config/plugins.js

@@ -3,7 +3,7 @@
 module.exports = {
 	// Repeated here from eslint-config-xo in case some plugins set something different
 	parserOptions: {
-		ecmaVersion: 2019,
+		ecmaVersion: 2020,
 		sourceType: 'module',
 		ecmaFeatures: {
 			jsx: true

package.json

@@ -14,7 +14,7 @@
 		"node": ">=6"
 	},
 	"scripts": {
-		"test": "node cli-main.js && eslint . && nyc ava"
+		"test": "node cli-main.js && eslint --quiet . && nyc ava"
 	},
 	"files": [
 		"config",
@@ -48,54 +48,56 @@
 		"simple"
 	],
 	"dependencies": {
-		"arrify": "^1.0.1",
+		"arrify": "^2.0.1",
 		"debug": "^4.1.0",
-		"eslint": "^5.15.0",
-		"eslint-config-prettier": "^3.3.0",
+		"eslint": "^6.2.0",
+		"eslint-config-prettier": "^6.1.0",
 		"eslint-config-xo": "^0.26.0",
 		"eslint-formatter-pretty": "^2.0.0",
-		"eslint-plugin-ava": "^5.1.0",
+		"eslint-plugin-ava": "^8.0.0",
 		"eslint-plugin-eslint-comments": "^3.0.1",
 		"eslint-plugin-import": "^2.14.0",
 		"eslint-plugin-no-use-extend-native": "^0.4.0",
 		"eslint-plugin-node": "^8.0.0",
 		"eslint-plugin-prettier": "^3.0.0",
 		"eslint-plugin-promise": "^4.0.0",
 		"eslint-plugin-unicorn": "^7.0.0",
-		"find-cache-dir": "^2.0.0",
-		"get-stdin": "^6.0.0",
+		"find-cache-dir": "^3.0.0",
+		"get-stdin": "^7.0.0",
 		"globby": "^9.0.0",
-		"has-flag": "^3.0.0",
+		"has-flag": "^4.0.0",
 		"lodash.isequal": "^4.5.0",
-		"lodash.mergewith": "^4.6.1",
+		"lodash.mergewith": "^4.6.2",
 		"meow": "^5.0.0",
-		"multimatch": "^3.0.0",
-		"open-editor": "^1.2.0",
-		"path-exists": "^3.0.0",
-		"pkg-conf": "^2.1.0",
+		"multimatch": "^4.0.0",
+		"open-editor": "^2.0.1",
+		"path-exists": "^4.0.0",
+		"pkg-conf": "^3.1.0",
 		"prettier": "^1.15.2",
-		"resolve-cwd": "^2.0.0",
-		"resolve-from": "^4.0.0",
-		"semver": "^5.5.0",
-		"slash": "^2.0.0",
-		"update-notifier": "^2.3.0",
+		"resolve-cwd": "^3.0.0",
+		"resolve-from": "^5.0.0",
+		"semver": "^6.3.0",
+		"slash": "^3.0.0",
+		"update-notifier": "^3.0.1",
 		"xo-init": "^0.7.0"
 	},
 	"devDependencies": {
 		"ava": "^1.1.0",
-		"coveralls": "^3.0.0",
-		"eslint-config-xo-react": "^0.17.0",
-		"eslint-plugin-react": "^7.6.1",
+		"coveralls": "^3.0.6",
+		"eslint-config-xo-react": "^0.20.0",
+		"eslint-plugin-react": "^7.14.3",
+		"eslint-plugin-react-hooks": "^1.7.0",
 		"execa": "^1.0.0",
-		"nyc": "^13.0.1",
+		"nyc": "^14.1.1",
 		"pify": "^4.0.0",
-		"proxyquire": "^2.0.1",
-		"temp-write": "^3.4.0"
+		"proxyquire": "^2.1.3",
+		"temp-write": "^4.0.0"
 	},
 	"eslintConfig": {
 		"extends": "eslint-config-xo"
 	},
 	"eslintIgnore": [
+		"cli.js",
 		"test/fixtures"
 	]
 }

test/fixtures/gitignore/test/bar.js

@@ -1,6 +1,6 @@
 import test from 'ava'
 import fn from '..'
 
-test(t => {
+test('main', t => {
    t.is(fn('foo'), fn('foobar'))
 })

test/fixtures/overrides/test/bar.js

@@ -1,6 +1,6 @@
 import test from 'ava'
 import fn from '..'
 
-test(t => {
+test('main', t => {
    t.is(fn('foo'), fn('foobar'))
 })

test/fixtures/overrides/test/foo.js

@@ -1,6 +1,6 @@
 import test from 'ava'
 import fn from '..'
 
-test(t => {
+test('main', t => {
     t.is(fn('foo'), fn('foobar'))
 })

test/open-report.js

@@ -1,5 +1,5 @@
-import test from 'ava';
 import path from 'path';
+import test from 'ava';
 import proxyquire from 'proxyquire';
 import fn from '..';
 

test/options-manager.js

@@ -43,7 +43,7 @@ test('normalizeOptions: falsie values stay falsie', t => {
 
 test('buildConfig: defaults', t => {
 	const config = manager.buildConfig({});
-	t.true(/[\\/]\.cache\/xo[\\/]?$/u.test(slash(config.cacheLocation)));
+	t.regex(slash(config.cacheLocation), /[\\/]\.cache\/xo[\\/]?$/u);
 	t.is(config.useEslintrc, false);
 	t.is(config.cache, true);
 	t.is(config.baseConfig.extends[0], 'xo/esnext');