Detect hours with period/dot as separator

[noviluni]

fixes: #643
fixes: #422

I worked on a solution for this issue and I got this. This is fully working and I added different cases to the tests coming from the issues. However, I think that this part of the code should be heavily refactored, as it's really hard to read, understand, and follow.

Solving this is not as trivial as it seems, because we use dots to separate the tokens, so it's hard to know when it's a valid HH.MM.

[codecov]

Codecov Report

Merging #741 into master will increase coverage by 0.08%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #741      +/-   ##
==========================================
+ Coverage   95.34%   95.42%   +0.08%     
==========================================
  Files         304      304              
  Lines        2622     2668      +46     
==========================================
+ Hits         2500     2546      +46     
  Misses        122      122              

Impacted Files	Coverage Δ
dateparser/parser.py	99.02% <100.00%> (+0.09%)	⬆️
dateparser/conf.py	100.00% <0.00%> (ø)
dateparser/search/__init__.py	100.00% <0.00%> (ø)
dateparser/languages/locale.py	98.65% <0.00%> (ø)
dateparser/utils/__init__.py	97.03% <0.00%> (+0.23%)	⬆️

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[Gallaecio]

Well, it works, and it seems as readable as things can get without a big refactoring, so ✔️