Ignore updates to cats-core

[armanbilge]

I think we get these because of this.

cats/build.sbt

Lines 281 to 291 in bf216a4

	lazy val binCompatTest = project
	.enablePlugins(NoPublishPlugin)
	.settings(
	useCoursier := false, // workaround so we can use an old version in compile
	libraryDependencies += {
	val oldV = if (tlIsScala3.value) "2.6.1" else "2.0.0"
	"org.typelevel" %%% "cats-core" % oldV % Provided
	}
	)
	.settings(testingDependencies)
	.dependsOn(core.jvm % Test)