❇️ Introducing fallback match for ASCII and UTF-8

[Ousret]

This will be used as a last resort only. In case the detection fails to find any suitable match.
This PR has been made according to some community wishes.

[codecov-commenter]

Codecov Report

Merging #64 (ec95f7f) into master (d8f0bf4) will increase coverage by 0.03%.
The diff coverage is 87.50%.

@@            Coverage Diff             @@
##           master      #64      +/-   ##
==========================================
+ Coverage   85.10%   85.14%   +0.03%     
==========================================
  Files          11       11              
  Lines        1061     1077      +16     
==========================================
+ Hits          903      917      +14     
- Misses        158      160       +2     

Impacted Files	Coverage Δ
charset_normalizer/api.py	84.12% <87.50%> (+0.31%)	⬆️

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