Bump version to 0.7.3

[rodrigc]

@adiroiban So if we:

1. Bump the version
2. Create a new tag 0.7.3

That will automatically release a new version of twistedchecker?

[codecov[bot]]

Codecov Report

Merging #140 into master will increase coverage by 0.09%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #140      +/-   ##
==========================================
+ Coverage   90.84%   90.94%   +0.09%     
==========================================
  Files          25       25              
  Lines        1016     1016              
  Branches      167      167              
==========================================
+ Hits          923      924       +1     
  Misses         62       62              
+ Partials       31       30       -1     

Impacted Files	Coverage Δ
twistedchecker/core/runner.py	89.00% <0.00%> (+0.50%)	:arrow_up:

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[adiroiban]

That will automatically release a new version of twistedchecker?

That was the plan. I saw that Glyph has updated the release user... so I guess that something went wrong.... but I see that Glyph created a new user and I guess that it works now.

Thanks a lot!