Add static clean up for arrow function convention

[traceyyoshima]

Braces and parentheses should be consistently used with arrow functions.

This issue will detect missing braces and functions and apply the applicable changes to the LST.
Note: there are additional rules not documented in the issue.
TODO: discover and add addition rules.

var foo = (a) => { foo(); }

vs

var foo = a => { foo(); }

[traceyyoshima]

Updated issue to reflect current status -- we haven't been working on this and plan to focus on type mapping and fixing the remaining parsing issues.