Replaced RegExp method parser with recursive descent

Summary:
public

This diff replaces the RegEx module method parser with a handwritten recursive descent parser that's faster and easier to maintain.

The new parser is ~8 times faster when tested on the UIManager.managerChildren() method, and uses ~1/10 as much RAM.

The new parser also supports lightweight generics, and is more tolerant of white space.

(This means that you now can – and should – use types like `NSArray<NSString *> *` for your exported properties and method arguments, instead of `NSStringArray`).

Reviewed By: jspahrsummers

Differential Revision: D2736636

fb-gh-sync-id: f6a11431935fa8acc8ac36f3471032ec9a1c8490

React/Base/RCTModuleData.m

@@ -122,9 +122,9 @@ RCT_NOT_IMPLEMENTED(- (instancetype)init);
         NSArray<NSString *> *entries =
           ((NSArray<NSString *> *(*)(id, SEL))imp)(_moduleClass, selector);
         id<RCTBridgeMethod> moduleMethod =
-          [[RCTModuleMethod alloc] initWithObjCMethodName:entries[1]
-                                             JSMethodName:entries[0]
-                                              moduleClass:_moduleClass];
+          [[RCTModuleMethod alloc] initWithMethodSignature:entries[1]
+                                              JSMethodName:entries[0]
+                                               moduleClass:_moduleClass];
 
         [moduleMethods addObject:moduleMethod];
       }