Release 0.3.0

[awvwgk]

Needed for next xtb release

[codecov]

Codecov Report

Merging #40 (6dfdef9) into main (95e3dce) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #40   +/-   ##
=======================================
  Coverage   69.88%   69.88%           
=======================================
  Files          60       60           
  Lines        7610     7610           
  Branches     2227     2227           
=======================================
  Hits         5318     5318           
  Misses        735      735           
  Partials     1557     1557           

Impacted Files	Coverage Δ
src/mctc/version.F90	33.33% <ø> (ø)

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