ci(commitlint): check for the presence of concrete PR number

[tiborsimko]

• ci(commitlint): check for the presence of concrete PR number

  Enrich commitlint checker in order to check the precise PR number in the commit log headline.

• ci(shellcheck): fix exit code propagation

  Return properly the exit code status of shellcheck command when looping through shell script files.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (b23f4df) 28.47% compared to head (1813ac3) 28.47%.

Additional details and impacted files

[](https://app.codecov.io/gh/reanahub/reana-workflow-engine-serial/pull/197?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=reanahub) ```diff @@ Coverage Diff @@ ## master #197 +/- ## ======================================= Coverage 28.47% 28.47% ======================================= Files 5 5 Lines 144 144 ======================================= Hits 41 41 Misses 103 103 ```