Align linting config with Assetgraph

.eslintrc

@@ -0,0 +1,17 @@
+{
+  "extends": ["standard", "prettier", "prettier/standard"],
+  "plugins": ["mocha"],
+  "rules": {
+    "prefer-template": "error",
+    "mocha/no-exclusive-tests": "error",
+    "mocha/no-nested-tests": "error",
+    "mocha/no-identical-title": "error",
+    "prefer-const": [
+      "error",
+      {
+        "destructuring": "all",
+        "ignoreReadBeforeAssign": false
+      }
+    ]
+  }
+}

lib/main.js

@@ -123,8 +123,8 @@ module.exports = async (argv, console) => {
       }
     }
   } else if (rootUrl && rootUrl.startsWith('file:')) {
-    inputUrls = [rootUrl + '**/*.html'];
-    console.error('No input files specified, defaulting to ' + inputUrls[0]);
+    inputUrls = [`${rootUrl}**/*.html`];
+    console.error(`No input files specified, defaulting to ${inputUrls[0]}`);
   } else {
     console.error(
       "No input files and no --root specified (or it isn't file:), cannot proceed.\n"

package.json

@@ -58,9 +58,14 @@
   },
   "devDependencies": {
     "coveralls": "^3.0.2",
-    "eslint": "^5.6.1",
-    "eslint-config-pretty-standard": "^2.0.0",
-    "eslint-plugin-prettier": "^3.0.0",
+    "eslint": "^6.0.0",
+    "eslint-config-prettier": "^6.0.0",
+    "eslint-config-standard": "^14.0.0",
+    "eslint-plugin-import": "^2.17.3",
+    "eslint-plugin-mocha": "^6.0.0",
+    "eslint-plugin-node": "^10.0.0",
+    "eslint-plugin-promise": "^4.0.1",
+    "eslint-plugin-standard": "^4.0.0",
     "httpception": "^2.0.0",
     "mocha": "^5.2.0",
     "nyc": "^13.0.1",

test/.eslintrc.yml

@@ -0,0 +1,2 @@
+env:
+  mocha: true

test/main.js

@@ -1,4 +1,4 @@
-/*global describe, it*/
+/* global describe, it */
 const sinon = require('sinon');
 const expect = require('unexpected').clone();
 const main = require('../lib/main');
@@ -55,14 +55,13 @@ describe('subfont', function() {
       ]);
 
       const rootUrl = encodeURI(
-        'file://' +
-          pathModule.resolve(
-            __dirname,
-            '..',
-            'testdata',
-            'stylesheetAtOtherOrigin',
-            'referencesFont'
-          )
+        `file://${pathModule.resolve(
+          __dirname,
+          '..',
+          'testdata',
+          'stylesheetAtOtherOrigin',
+          'referencesFont'
+        )}`
       );
 
       const assetGraph = await main(
@@ -76,7 +75,7 @@ describe('subfont', function() {
       expect(
         cssAsset.url,
         'to equal',
-        assetGraph.root + 'subfont/styles-38ce4ca68c.css'
+        `${assetGraph.root}subfont/styles-38ce4ca68c.css`
       );
     });
   });
@@ -113,14 +112,13 @@ describe('subfont', function() {
       ]);
 
       const rootUrl = encodeURI(
-        'file://' +
-          pathModule.resolve(
-            __dirname,
-            '..',
-            'testdata',
-            'stylesheetAtOtherOrigin',
-            'referencesFont'
-          )
+        `file://${pathModule.resolve(
+          __dirname,
+          '..',
+          'testdata',
+          'stylesheetAtOtherOrigin',
+          'referencesFont'
+        )}`
       );
 
       const assetGraph = await main(
@@ -199,7 +197,7 @@ describe('subfont', function() {
 
   it('should not dive into iframes', async function() {
     const rootUrl = encodeURI(
-      'file://' + pathModule.resolve(__dirname, '..', 'testdata', 'iframe')
+      `file://${pathModule.resolve(__dirname, '..', 'testdata', 'iframe')}`
     );
 
     const assetGraph = await main(