add cargo hack to ci

[Wukong247]

Add cargo hack to test all possible feature combination.

[codecov]

Codecov Report

Attention: Patch coverage is 70.58824% with 15 lines in your changes missing coverage. Please review.

Project coverage is 73.54%. Comparing base (3096859) to head (dc374bf).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
src/maker/server.rs	85.71%	4 Missing ⚠️
src/taker/api.rs	75.00%	4 Missing ⚠️
src/market/directory.rs	0.00%	3 Missing ⚠️
src/bin/directoryd.rs	0.00%	2 Missing ⚠️
src/bin/makerd.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #337      +/-   ##
==========================================
- Coverage   73.56%   73.54%   -0.03%     
==========================================
  Files          33       33              
  Lines        4082     4082              
==========================================
- Hits         3003     3002       -1     
- Misses       1079     1080       +1     

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[mojoX911]

Ack