Relax rule: Spacing around * in generator functions

There is an issue with the interaction between babel-eslint and eslint.
See eslint/eslint#6274

I think we'll just have to disable the generator-star-spacing rule
until ESLint has support for the async keyword. Bummer.

See standard/standard#564 (comment)

eslintrc.json

@@ -38,7 +38,6 @@
     "dot-location": [2, "property"],
     "eol-last": 2,
     "eqeqeq": [2, "allow-null"],
-    "generator-star-spacing": [2, { "before": true, "after": true }],
     "handle-callback-err": [2, "^(err|error)$" ],
     "indent": [2, 2, { "SwitchCase": 1 }],
     "key-spacing": [2, { "beforeColon": false, "afterColon": true }],