style(prettier): Use prettier for code formatting

This saves us style issues. Also adds husky and lint-staged for pre-commit testing

Refs #709

Author: tmcw

Diff for: lib/infer/finders.js

@@ -11,7 +11,10 @@ var t = require('babel-types');
  * @returns {?Object} ast path, if one is found.
  * @private
  */
-function findTarget(path /*: Object */) { if (!path) { return path; }
+function findTarget(path /*: Object */) {
+  if (!path) {
+    return path;
+  }
 
   if (
     t.isExportDefaultDeclaration(path) ||