Prepare for first release

[zifter]

No description provided.

[codecov]

Codecov Report

Merging #5 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master     #5   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           4      4           
  Lines          70     73    +3     
=====================================
+ Hits           70     73    +3

Impacted Files	Coverage Δ
numeral_system/__init__.py	100% <100%> (ø)	⬆️

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