plugin does not work with sbt 1.4.6

[francisdb]

addSbtPlugin("pl.otrebski" % "sbt-flaky" % "0.14")

[info] Updating
https://repo.scala-sbt.org/scalasbt/sbt-plugin-releases/pl.otrebski/sbt-flaky/scala_2.12/sbt_1.0/0.14/ivys/ivy.xml
  100,0% [##########] 3,2 KiB (4,4 KiB / s)
https://repo1.maven.org/maven2/io/circe/circe-generic_2.12/0.8.0/circe-generic_2.12-0.8.0.pom
  100,0% [##########] 2,5 KiB (52,3 KiB / s)
https://repo1.maven.org/maven2/io/circe/circe-core_2.12/0.8.0/circe-core_2.12-0.8.0.pom
  100,0% [##########] 1,9 KiB (21,7 KiB / s)
https://repo1.maven.org/maven2/io/circe/circe-parser_2.12/0.8.0/circe-parser_2.12-0.8.0.pom
  100,0% [##########] 1,9 KiB (21,7 KiB / s)
https://repo1.maven.org/maven2/org/apache/commons/commons-vfs2/2.1/commons-vfs2-2.1.pom
  100,0% [##########] 11,1 KiB (125,0 KiB / s)
https://repo1.maven.org/maven2/com/lihaoyi/scalatags_2.12/0.6.5/scalatags_2.12-0.6.5.pom
  100,0% [##########] 2,6 KiB (15,7 KiB / s)
https://repo1.maven.org/maven2/org/apache/commons/commons-vfs2-project/2.1/commons-vfs2-project-2.1.pom
  100,0% [##########] 19,3 KiB (482,5 KiB / s)
https://repo1.maven.org/maven2/org/apache/commons/commons-parent/40/commons-parent-40.pom
  100,0% [##########] 62,6 KiB (1,3 MiB / s)
https://repo1.maven.org/maven2/io/circe/circe-jawn_2.12/0.8.0/circe-jawn_2.12-0.8.0.pom
  100,0% [##########] 1,9 KiB (45,5 KiB / s)
https://repo1.maven.org/maven2/io/circe/circe-numbers_2.12/0.8.0/circe-numbers_2.12-0.8.0.pom
  100,0% [##########] 2,0 KiB (46,2 KiB / s)
https://repo1.maven.org/maven2/org/typelevel/cats-core_2.12/0.9.0/cats-core_2.12-0.9.0.pom
  100,0% [##########] 4,5 KiB (104,3 KiB / s)
https://repo1.maven.org/maven2/com/github/mpilquist/simulacrum_2.12/0.10.0/simulacrum_2.12-0.10.0.pom
  100,0% [##########] 2,0 KiB (54,6 KiB / s)
https://repo1.maven.org/maven2/org/typelevel/cats-macros_2.12/0.9.0/cats-macros_2.12-0.9.0.pom
  100,0% [##########] 3,9 KiB (106,3 KiB / s)
https://repo1.maven.org/maven2/org/typelevel/machinist_2.12/0.6.1/machinist_2.12-0.6.1.pom
  100,0% [##########] 1,7 KiB (30,5 KiB / s)
https://repo1.maven.org/maven2/org/typelevel/cats-kernel_2.12/0.9.0/cats-kernel_2.12-0.9.0.pom
  100,0% [##########] 3,6 KiB (26,5 KiB / s)
[info] Resolved  dependencies
[warn]
[warn] 	Note: Unresolved dependencies path:
[error] sbt.librarymanagement.ResolveException: Error downloading com.typesafe.sbt:sbt-git:0.9.3
[error]   Not found
[error]   Not found
[error]   not found: https://repo1.maven.org/maven2/com/typesafe/sbt/sbt-git/0.9.3/sbt-git-0.9.3.pom
[error]   not found: /Users/francisdb/.ivy2/local/com.typesafe.sbt/sbt-git/0.9.3/ivys/ivy.xml
[error]   not found: https://repo.scala-sbt.org/scalasbt/sbt-plugin-releases/com.typesafe.sbt/sbt-git/0.9.3/ivys/ivy.xml
[error]   not found: https://repo.typesafe.com/typesafe/ivy-releases/com.typesafe.sbt/sbt-git/0.9.3/ivys/ivy.xml
[error] 	at lmcoursier.CoursierDependencyResolution.unresolvedWarningOrThrow(CoursierDependencyResolution.scala:258)
[error] 	at lmcoursier.CoursierDependencyResolution.$anonfun$update$38(CoursierDependencyResolution.scala:227)
[error] 	at scala.util.Either$LeftProjection.map(Either.scala:573)
[error] 	at lmcoursier.CoursierDependencyResolution.update(CoursierDependencyResolution.scala:227)
[error] 	at sbt.librarymanagement.DependencyResolution.update(DependencyResolution.scala:60)
[error] 	at sbt.internal.LibraryManagement$.resolve$1(LibraryManagement.scala:53)
[error] 	at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$12(LibraryManagement.scala:103)
[error] 	at sbt.util.Tracked$.$anonfun$lastOutput$1(Tracked.scala:73)
[error] 	at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$20(LibraryManagement.scala:116)
[error] 	at scala.util.control.Exception$Catch.apply(Exception.scala:228)
[error] 	at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$11(LibraryManagement.scala:116)
[error] 	at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$11$adapted(LibraryManagement.scala:97)
[error] 	at sbt.util.Tracked$.$anonfun$inputChangedW$1(Tracked.scala:219)
[error] 	at sbt.internal.LibraryManagement$.cachedUpdate(LibraryManagement.scala:130)
[error] 	at sbt.Classpaths$.$anonfun$updateTask0$5(Defaults.scala:3486)
[error] 	at scala.Function1.$anonfun$compose$1(Function1.scala:49)
[error] 	at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:62)
[error] 	at sbt.std.Transform$$anon$4.work(Transform.scala:68)
[error] 	at sbt.Execute.$anonfun$submit$2(Execute.scala:282)
[error] 	at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:23)
[error] 	at sbt.Execute.work(Execute.scala:291)
[error] 	at sbt.Execute.$anonfun$submit$1(Execute.scala:282)
[error] 	at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
[error] 	at sbt.CompletionService$$anon$2.call(CompletionService.scala:64)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
[error] 	at java.base/java.lang.Thread.run(Thread.java:834)
[error] (update) sbt.librarymanagement.ResolveException: Error downloading com.typesafe.sbt:sbt-git:0.9.3
[error]   Not found
[error]   Not found
[error]   not found: https://repo1.maven.org/maven2/com/typesafe/sbt/sbt-git/0.9.3/sbt-git-0.9.3.pom
[error]   not found: /Users/francisdb/.ivy2/local/com.typesafe.sbt/sbt-git/0.9.3/ivys/ivy.xml
[error]   not found: https://repo.scala-sbt.org/scalasbt/sbt-plugin-releases/com.typesafe.sbt/sbt-git/0.9.3/ivys/ivy.xml
[error]   not found: https://repo.typesafe.com/typesafe/ivy-releases/com.typesafe.sbt/sbt-git/0.9.3/ivys/ivy.xml
[warn] Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore? (default: r)

[PiotrBosak]

I know this thread is pretty old but recently I created a fork fixing this issue. It's not merged because I've removed most of the features from the original project but it does the most important thing and allows to run single test suites.