78 es6 config (#16)

* Add new es6 common config enforcing no-var

* Add to index.js

* Fix import?

* Fix import? 2

* Add no-confusing-arrow and strict (global)

* Add arrow-parens. Also comments and organization.

* Revert change to old yml. Add no-const-assign to ES6.

* rename key from ugly commonEs6 common-es6

* Improve comment

README.md

@@ -22,6 +22,13 @@ extends:
     "plugin:bodylabs/common"
 ```
 
+Or for ES6:
+
+```yml
+extends:
+    "plugin:bodylabs/common-es6"
+```
+
 And then set up scripts:
 
 ```json

eslint/common-es6.yml

@@ -0,0 +1,17 @@
+extends:
+    "./eslint/common.yml"
+
+rules:
+    strict: ["error", "global"]
+
+    no-var: "error"
+    no-const-assign: "error"
+
+    # No parens single-arg arrow functions:
+    # a => a; // instead of (a) => a
+    # Other cases are still good:
+    # () => {};
+    # (a, b, c) => a;
+    arrow-parens: ["error", "as-needed"]
+    # Don't write `a => 1 ? 2 : 3` (could be confused with `a <= 1 ? 2 : 3;`)
+    no-confusing-arrow: "error"

index.js

@@ -13,5 +13,6 @@ const loadConfig = (name) => {
 module.exports = {
     configs: {
         common: loadConfig('common'),
+        'common-es6': loadConfig('common-es6'),
     },
 };

package.json

@@ -1,6 +1,6 @@
 {
   "name": "eslint-plugin-bodylabs",
-  "version": "7.0.0",
+  "version": "7.1.0",
   "description": "Body Labs JavaScript style",
   "repository": {
     "type": "git",