add linting and formatting

Author: dlwagner

.eslintrc.json

@@ -0,0 +1,17 @@
+{
+  "env": {
+    "commonjs": true,
+    "es6": true,
+    "node": true
+  },
+  "extends": ["airbnb-base", "prettier"],
+  "plugins": ["prettier"],
+  "globals": {
+    "Atomics": "readonly",
+    "SharedArrayBuffer": "readonly"
+  },
+  "parserOptions": {
+    "ecmaVersion": 2018
+  },
+  "rules": { "prettier/prettier": ["error"] }
+}

.prettierrc

@@ -0,0 +1,6 @@
+{
+    "semi": true,
+    "trailingComma": "all",
+    "singleQuote": true,
+    "printWidth": 70,
+}

.vscode

@@ -0,0 +1,3 @@
+{
+  "editor.formatOnSave": true,
+}