fix bug in parameter validation

[KevinMenden]

Fixes the bug described in #1087

Now typos like --clip_R1 instead of --clip_r1 are properly recognized again.

PR checklist

• This comment contains a description of changes (with reason)
• CHANGELOG.md is updated
• If you've fixed a bug or added code that should be tested, add tests!
• Documentation in docs is updated

[codecov]

Codecov Report

Merging #1088 (2602843) into dev (7ba366d) will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##              dev    #1088      +/-   ##
==========================================
+ Coverage   72.20%   72.24%   +0.04%     
==========================================
  Files          36       36              
  Lines        4547     4547              
==========================================
+ Hits         3283     3285       +2     
+ Misses       1264     1262       -2     

Impacted Files	Coverage Δ
nf_core/modules/lint.py	75.47% <0.00%> (+0.21%)	⬆️
nf_core/bump_version.py	89.70% <0.00%> (+1.47%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update d49bf61...2602843. Read the comment docs.

[KevinMenden]

I have also relaxed the module tests, such that they are currently only requiring that there are no failed tests and that there are at least some passed tests. Because it can happen that we have some warnings every now and then.
This is clearly not ideal and we still need to improve those module lint tests, but it won't bug us as much anymore and should still capture anything that's breaking something.

[KevinMenden]

this line could also be removed of course, as it's always true

[ewels]

LGTM! Really need to do some lint test refactoring.. We should think about prioritising this as a project soon.

[KevinMenden]

Definitely .... I thought about it twice now but never came up with really satisfying solution yet 🤔