Bump version 2.8.0

[mfl28]

Closes #150

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.59%. Comparing base (8835a6a) to head (857b3f7).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #151   +/-   ##
=========================================
  Coverage     86.59%   86.59%           
  Complexity     1503     1503           
=========================================
  Files            99       99           
  Lines          6048     6048           
  Branches        539      539           
=========================================
  Hits           5237     5237           
  Misses          534      534           
  Partials        277      277           

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