Add default config.

package.json

@@ -17,47 +17,28 @@
       "url": "https://opensource.org/licenses/GPL-3.0"
     }
   ],
-  "browserslist": [
-    "last 2 versions",
-    "android 4",
-    "opera 12"
-  ],
+  "browserslist": ["last 2 versions", "android 4", "opera 12"],
   "eslintConfig": {
-    "extends": "humanmade",
-    "globals": {
-      "jQuery": true,
-      "wp": true
-    },
-    "rules": {
-      "jsx-a11y/href-no-hash": 0
-    }
+    "extends": "./node_modules/pressbooks-build-tools/config/eslint.js"
   },
   "stylelint": {
-    "extends": [
-      "stylelint-config-recommended-scss",
-      "./node_modules/prettier-stylelint/config.js"
-    ],
-    "rules": {
-      "media-feature-name-no-unknown": [
-        true,
-        {
-          "ignoreMediaFeatureNames": [
-            "min--moz-device-pixel-ratio"
-          ]
-        }
-      ],
-      "media-query-list-comma-space-after": "always-single-line"
-    }
+    "extends": "./node_modules/pressbooks-build-tools/config/stylelint.js"
   },
   "scripts": {
-    "build": "cross-env NODE_ENV=development webpack --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
-    "build:production": "cross-env NODE_ENV=production webpack --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
-    "build:profile": "cross-env NODE_ENV=production webpack --progress --profile --json --config=node_modules/laravel-mix/setup/webpack.config.js",
-    "start": "cross-env NODE_ENV=development webpack --watch --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
+    "build":
+      "cross-env NODE_ENV=development webpack --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
+    "build:production":
+      "cross-env NODE_ENV=production webpack --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
+    "build:profile":
+      "cross-env NODE_ENV=production webpack --progress --profile --json --config=node_modules/laravel-mix/setup/webpack.config.js",
+    "start":
+      "cross-env NODE_ENV=development webpack --watch --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
     "rmdist": "rimraf dist",
     "lint": "npm run -s lint:scripts && npm run -s lint:styles",
-    "lint:scripts": "node_modules/eslint/bin/eslint.js \"resources/assets/scripts/*.js\"",
-    "lint:styles": "node_modules/stylelint/bin/stylelint.js \"resources/assets/styles/**/*.scss\" --syntax scss",
+    "lint:scripts":
+      "node_modules/eslint/bin/eslint.js \"resources/assets/scripts/*.js\"",
+    "lint:styles":
+      "node_modules/stylelint/bin/stylelint.js \"resources/assets/styles/**/*.scss\" --syntax scss",
     "test": "npm run -s lint"
   },
   "engines": {