Switch to eslint

Adapted from JakeChampion/fetch#616

.eslintrc.json

@@ -0,0 +1,45 @@
+{
+  "parserOptions": {
+    "sourceType": "module"
+  },
+  "globals": {
+    "Yetch": true,
+    "ArrayBuffer": true,
+    "DataView": true,
+    "Promise": true,
+    "Symbol": true,
+    "Uint8Array": true
+  },
+  "extends": [
+    "plugin:github/browser"
+  ],
+  "rules": {
+    "object-shorthand": "off"
+  },
+  "overrides": [
+    {
+      "files": ["test/*.js"],
+      "env": {
+        "browser": true,
+        "mocha": true
+      },
+      "globals": {
+        "assert": true,
+        "chai": true,
+        "FileReaderSync": true
+      }
+    },
+    {
+      "files": ["test/{karma,server}*.js"],
+      "env": {
+        "node": true
+      }
+    },
+    {
+      "files": ["test/worker.js"],
+      "env": {
+        "worker": true
+      }
+    }
+  ]
+}

package.json

@@ -14,7 +14,8 @@
     "@types/node": "^10.1.2",
     "abortcontroller-polyfill": "^1.1.9",
     "chai": "^4.1.2",
-    "jshint": "2.8.0",
+    "eslint": "^4.19.1",
+    "eslint-plugin-github": "^1.0.0",
     "karma": "^1.7.1",
     "karma-chai": "^0.1.0",
     "karma-chrome-launcher": "^2.2.0",
@@ -40,7 +41,7 @@
     "build": "npm run build:cjs && npm run build:bundle",
     "build:bundle": "rollup -c",
     "build:cjs": "tsc -p ./src",
-    "lint": "jshint src/**/*.js test/*.js",
+    "lint": "eslint --report-unused-disable-directives *.js test/*.js",
     "karma": "karma start ./test/karma.config.js --no-single-run --auto-watch",
     "pretest": "npm run lint && npm run build",
     "test": "karma start ./test/karma.config.js && karma start ./test/karma-worker.config.js"

prettier.config.js

@@ -0,0 +1 @@
+module.exports = require('eslint-plugin-github/prettier.config')