Do not select versions with a "smaller" pre-release identifier

[fthomas]

Prevents PRs like VirtusLab/scala-cli#407.

[codecov]

Codecov Report

Merging #2367 (aac4e37) into master (5cf6463) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #2367   +/-   ##
=======================================
  Coverage   80.36%   80.36%           
=======================================
  Files         139      139           
  Lines        2388     2388           
  Branches       55       58    +3     
=======================================
  Hits         1919     1919           
  Misses        469      469           

Impacted Files	Coverage Δ
...ain/scala/org/scalasteward/core/data/Version.scala	100.00% <100.00%> (ø)

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