`coreJVM/packageSrc` fails with "duplicate entry" error

[SethTisue]

this came up in the Scala 2 community build

[error] java.util.zip.ZipException: duplicate entry: cats/instances/package.scala
[error] 	at java.base/java.util.zip.ZipOutputStream.putNextEntry(ZipOutputStream.java:241)
[error] 	at java.base/java.util.jar.JarOutputStream.putNextEntry(JarOutputStream.java:115)
[error] 	at sbt.io.IO$.addFileEntry$1(IO.scala:709)
[error] 	at sbt.io.IO$.$anonfun$writeZip$6(IO.scala:718)
[error] 	at sbt.io.IO$.$anonfun$writeZip$6$adapted(IO.scala:718)

[armanbilge]

Woops, thanks for the report. If nobody gets to it I'll fix it while working on #4143.

[SethTisue]

scala/community-build@4dfa437 👍