Add package.json & update dot files

.eslintrc

@@ -1,12 +1,13 @@
 # https://github.com/eslint/eslint/blob/master/docs/rules/README.md
 
 parserOptions:
-  ecmaVersion: 2015
+  ecmaVersion: 2017
 
 env:
   browser: true
   es6: true
   webextensions: true
+  node: true
 
 globals:
   # messaging.js
@@ -224,7 +225,7 @@ rules:
   no-unsafe-negation: [2]
   no-unused-expressions: [1]
   no-unused-labels: [0]
-  no-unused-vars: [1, {args: after-used, vars: local, argsIgnorePattern: ^_}]
+  no-unused-vars: [0]
   no-use-before-define: [2, nofunc]
   no-useless-call: [2]
   no-useless-computed-key: [2]

.gitignore

@@ -1,3 +1,6 @@
 .DS_Store
 pull_locales_login.rb
 .vscode
+node_modules/
+package-lock.json
+yarn.lock

package.json

@@ -0,0 +1,8 @@
+{
+  "name": "Stylus",
+  "version": "1.4.16",
+  "description": "Redesign the web with Stylus, a user styles manager",
+  "license": "GPL-3.0-only",
+  "repository": "openstyles/stylus",
+  "author": "Stylus Team"
+}