ESLint: match quote style, add more non-default strictness

Author: jokeyrhyme

.eslintrc

@@ -1,5 +1,35 @@
 {
   "env": {
+    "mocha": true,
     "node": true
-  }
-}
+  },
+  "rules": {
+    /* Possible Errors */
+    "no-extra-parens": 2,
+    "valid-jsdoc": 2,
+    /* Best Practices */
+    "block-scoped-var": 2,
+    "complexity": [1, 3],
+    "default-case": 2,
+    "dot-notation": [2],
+    "guard-for-in": 2,
+    "no-div-regex": 2,
+    "no-else-return": 2,
+    "no-eq-null": 2,
+    "no-floating-decimal": 2,
+    "no-process-env": 2,
+    "no-self-compare": 2,
+    "no-void": 2,
+    "no-warning-comments": 2,
+    "radix": 2,
+    "vars-on-top": 2,
+    "wrap-iife": 2,
+    /* Variables */
+    "no-catch-shadow": 2,
+    /* Node.JS */
+    "no-sync": 2,
+    /* Stylistic Issues */
+    "no-mixed-spaces-and-tabs": 2,
+    "no-underscore-dangle": 2,
+    "quotes": [1, "single", "avoid-escape"]
+  }}