Add conifugration for implicit hyphon characters between words

[rolandmueller]

Add a new Configuration implicit_hyphon (default false) for automatically adding hyphon characters - to the rules.
Enabling implicit_hyphon is disabling implicit_punct.
Rationale: implicit_punct is often to much inclusive. The implicit_punct has the hyphon token included, but it is adding (at least in my use case) unwanted tokens (like parentheses) to the matches, especially for more complex rules. So implicit_hyphon is a little bit more strict than implicit_punct.

[codecov]

Codecov Report

Merging #84 into master will increase coverage by 0.75%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #84      +/-   ##
==========================================
+ Coverage   92.61%   93.36%   +0.75%     
==========================================
  Files          12       12              
  Lines         636      648      +12     
  Branches      108      112       +4     
==========================================
+ Hits          589      605      +16     
+ Misses         32       30       -2     
+ Partials       15       13       -2     

Impacted Files	Coverage Δ
rita/config.py	91.04% <ø> (ø)
rita/preprocess.py	100.00% <100.00%> (+0.75%)	⬆️
rita/engine/translate_standalone.py	90.10% <0.00%> (+3.29%)	⬆️

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