add support for 刚刚

[noviluni]

Fixes: #854

Now dateparser.parse("刚刚") returns "now" instead of None.

[codecov]

Codecov Report

Merging #910 (2ac4719) into master (c15098e) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #910   +/-   ##
=======================================
  Coverage   98.26%   98.26%           
=======================================
  Files         231      231           
  Lines        2597     2597           
=======================================
  Hits         2552     2552           
  Misses         45       45           

Impacted Files	Coverage Δ
dateparser/data/date_translation_data/zh.py	100.00% <ø> (ø)

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[peonone]

LGTM @noviluni , thanks for adding this!