Method calls are not closed correctly

[winstliu]

The meta.function-call.c rule contains a match which only matches up to the beginning parentheses. Everything else thereafter is not tokenized as a function call.

  methodCall(hi);
//^^^^^^^^^^^ meta.function-call.c
//           ^^^ incorrect

As far as I can tell this has been a problem since the initial conversion to CSON.

/cc @MaximSokolov I'm sure you'd like to work on this 😄.