bump dev dependancies for grunt testing
bump dev dependancies for grunt testing

vxvinh1511/TinyColor,weepy/TinyColor,bgrins/TinyColor,vxvinh1511/TinyColor,GerHobbelt/TinyColor,pandabamboo90/TinyColor,dabassett/TinyColor,mwcz/TinyColor,mwcz/TinyColor,dabassett/TinyColor,GerHobbelt/TinyColor,weepy/TinyColor,pandabamboo90/TinyColor,bgrins/TinyColor