Add migration rule for (not yet released) scalacheck 1.14.1

[smarter]

See typelevel/scalacheck#498

[codecov]

Codecov Report

Merging #853 into master will increase coverage by 0.13%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #853      +/-   ##
==========================================
+ Coverage   66.95%   67.08%   +0.13%     
==========================================
  Files          88       88              
  Lines        1256     1261       +5     
  Branches       42       39       -3     
==========================================
+ Hits          841      846       +5     
  Misses        415      415

Impacted Files	Coverage Δ
...scala/org/scalasteward/core/scalafix/package.scala	100% <100%> (ø)	⬆️

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[fthomas]

Many thanks @smarter!

[fthomas]

FYI: Scala Steward PRs with this migration applied can be found via:
https://github.com/pulls?q=author%3Ascala-steward+is%3Apr+%22github%3Atypelevel%2Fscalacheck%2Fv1_14_1%3Fsha%3D3fc537dde9d8fdf951503a8d8b027a568d52d055%22

It is still creating new PRs for ScalaCheck 1.14.1. When it is done, I'll list here the PRs that contain source code changes due to this migration.

[fthomas]

Until now Scala Steward has created 179 public PRs with this migration applied. Six of those also contain source code changes due to the migration:

• Update scalacheck to 1.14.1 fdietze/flatland#21
• Update scalacheck to 1.14.1 finagle/finch#1159
• Update scalacheck to 1.14.2 finagle/finch#1165
• Update scalacheck to 1.14.1 nevillelyh/shapeless-datatype#54
• Update scalacheck to 1.14.1 Philippus/baggage-jwt#23
• Update scalacheck to 1.14.1 spotify/featran#289

At $WORK we are using Scala Steward for three private repos and also got one PR with source code changes. So I assume some more with source code changes were created by other private Scala Steward instances.