Extract padToSameLength from Order[Version]

[fthomas]

No description provided.

[codecov]

Codecov Report

Merging #580 into master will increase coverage by 0.02%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #580      +/-   ##
==========================================
+ Coverage   59.02%   59.04%   +0.02%     
==========================================
  Files          67       67              
  Lines         859      857       -2     
  Branches       38       38              
==========================================
- Hits          507      506       -1     
+ Misses        352      351       -1

Impacted Files	Coverage Δ
...in/scala/org/scalasteward/core/model/Version.scala	100% <100%> (+6.66%)	⬆️

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