Update to prettier 2 and use eslint to run it

.eslintrc

@@ -1,10 +1,11 @@
 {
   "extends": ["standard", "prettier", "prettier/standard"],
-  "plugins": ["mocha"],
+  "plugins": ["mocha", "prettier"],
   "env": {
     "mocha": true
   },
   "rules": {
+    "prettier/prettier": "error",
     "prefer-template": "error",
     "mocha/no-exclusive-tests": "error",
     "mocha/no-nested-tests": "error",

lib/index.js

@@ -16,15 +16,15 @@ const immutableHeaders = `
 module.exports = {
   onPostBuild: async ({
     constants: { BUILD_DIR },
-    inputs: { entryPoints, ...subfontConfig }
+    inputs: { entryPoints, ...subfontConfig },
   }) => {
     console.log(
       `Running subfont version ${require('subfont/package.json').version}`
     );
 
     const resolvedEntryPoints = globby
       .sync(entryPoints, { cwd: BUILD_DIR })
-      .map(path => resolve(BUILD_DIR, path));
+      .map((path) => resolve(BUILD_DIR, path));
 
     const headerPromise = appendFile(
       resolve(BUILD_DIR, '_headers'),
@@ -37,13 +37,13 @@ module.exports = {
         inputFiles: resolvedEntryPoints,
         root: BUILD_DIR,
         canonicalRoot,
-        inPlace: true
+        inPlace: true,
       },
       console
     );
 
     await headerPromise;
 
     return result;
-  }
+  },
 };

package.json

@@ -44,21 +44,22 @@
     "eslint-plugin-import": "^2.20.2",
     "eslint-plugin-mocha": "^6.3.0",
     "eslint-plugin-node": "^11.1.0",
+    "eslint-plugin-prettier": "^3.1.2",
     "eslint-plugin-promise": "^4.0.1",
     "eslint-plugin-standard": "^4.0.0",
     "magicpen-prism": "^4.0.0",
     "mocha": "^7.1.1",
     "nyc": "^15.0.1",
     "offline-github-changelog": "^1.6.1",
-    "prettier": "^1.19.1",
+    "prettier": "^2.0.2",
     "rimraf": "^3.0.2",
     "unexpected": "^11.14.0"
   },
   "main": "lib/index.js",
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "cpy site dist",
-    "lint": "eslint . && prettier --check '**/*.js'",
+    "lint": "eslint .",
     "test": "mocha",
     "netlify-build": "netlify-build",
     "ci": "npm run lint && npm run coverage && npm run netlify-build",