core's UrlUtilsTest imported kotlin.test, but core only declares libs.junit, so :core:compileDebugUnitTestKotlin failed. lib/unpacker used kotlin-test-junit instead, and src/en/hanime configured a test/ source directory and hardcoded test dependencies although no tests were ever committed there.
Settle on JUnit, which NextJsTest (from upstream) and lib/megaextractor already use: switch UrlUtilsTest and the lib/unpacker tests to org.junit, declare libs.junit in lib/unpacker, and drop hanime's unused test setup. JUnit takes the assertion message first, so the 9 assertTrue/assertFalse calls in lib/unpacker that pass one have their arguments swapped.
Only test code and configuration change, so nothing needs bumping or building. Without the prefix, CI would bump every extension that depends on lib/unpacker.