bump version 0.14.9

bump version 0.14.8

closes colyseus#40

test colyseus#40 on a clean heaps project

use @serjek's suggestion. closes colyseus#41

fix compilation with '-dce full'

closes colyseus#39. thanks @serjek ❤️

update version

fixes msgpack decoder to support decoding 'undefined' and 'Date'. closes

 colyseus#37

Merge pull request colyseus#29 from colyseus/0.13.0

0.13.0