Update license, lang-version and style config

[JimBobSquarePants]

Prerequisites

• I have written a descriptive pull-request title
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• I have provided test coverage for my change (where applicable)

Description

Updated the license and style config to latest. Also bumped the language version

[codecov]

Codecov Report

Merging #31 (0179137) into main (77cec7d) will not change coverage.
The diff coverage is n/a.

@@        Coverage Diff         @@
##           main   #31   +/-   ##
==================================
  Coverage    19%   19%           
==================================
  Files         4     4           
  Lines       359   359           
  Branches     88    88           
==================================
  Hits         71    71           
  Misses      288   288           

Flag	Coverage Δ
unittests	19% <ø> (ø)

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