Bump ansi-styles version.
Bump ansi-styles version.

Fixes #63 as ansi-styles now exposes a unique object per required
instance.

lukeapage/chalk,sindresorhus/chalk,pedroha/chalk,chalk/chalk,hughsk/chalk,chalk/chalk,stevemao/chalk,rsandor/chalk,yamii/chalk,joegesualdo/chalk,sterpe/chalk,cnuis2cool/chalk