Upgrade to ESLint 5

Author: sindresorhus

package.json

@@ -65,7 +65,7 @@
 		"arrify": "^1.0.1",
 		"deep-strict-equal": "^0.2.0",
 		"enhance-visitors": "^1.0.0",
-		"espree": "^3.1.3",
+		"espree": "^4.0.0",
 		"espurify": "^1.5.0",
 		"import-modules": "^1.1.0",
 		"multimatch": "^2.1.0",
@@ -75,15 +75,15 @@
 		"ava": "*",
 		"babel-eslint": "^8.0.2",
 		"coveralls": "^3.0.0",
-		"eslint": "^4.5.0",
+		"eslint": "^5.0.0",
 		"eslint-ava-rule-tester": "^2.0.0",
 		"js-combinatorics": "^0.5.0",
-		"nyc": "^11.1.0",
+		"nyc": "^12.0.2",
 		"pify": "^3.0.0",
 		"xo": "*"
 	},
 	"peerDependencies": {
-		"eslint": ">=3.6"
+		"eslint": ">=5.0.0"
 	},
 	"ava": {
 		"failWithoutAssertions": true

readme.md

@@ -26,7 +26,7 @@ Configure it in `package.json`.
 			"es6": true
 		},
 		"parserOptions": {
-			"ecmaVersion": 2017,
+			"ecmaVersion": 2018,
 			"sourceType": "module"
 		},
 		"plugins": [

test/no-async-fn-without-await.js

@@ -9,7 +9,7 @@ const header = `const test = require('ava');\n`;
 const ruleTesterOptions = [
 	{
 		parserOptions: {
-			ecmaVersion: 2017
+			ecmaVersion: 2018
 		}
 	},
 	{

test/prefer-power-assert.js

@@ -8,7 +8,7 @@ const ruleTester = avaRuleTester(test, {
 		es6: true
 	},
 	parserOptions: {
-		ecmaVersion: 6,
+		ecmaVersion: 2018,
 		sourceType: 'module'
 	}
 });