fix: pin apiVersion/languageVersion to 2.1, release beta20 - #58
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… force onto consumers beta19's Kotlin 2.3.0 bump stamped published metadata mv=[2,3,0], which older Kotlin compilers can't read at all. Pin the compiler's apiVersion/languageVersion to 2.1 so lumen still builds with 2.3.0 but emits 2.1-compatible metadata. Verified via javap on the built jar's kotlin.Metadata annotation. Bump to 1.0.0-beta20.
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Fixes: beta19's Kotlin 2.3.0 toolchain bump was forcing that version onto every consumer app — published metadata was stamped
mv=[2,3,0], unreadable by older Kotlin compilers.Pinned
apiVersion/languageVersiontoKOTLIN_2_1inlumen/build.gradle.kts. Lumen still builds with the 2.3.0 toolchain, but emits 2.1-compatible metadata. Verified viajavapon the built jar —kotlin.Metadata.mvnow reads[2,1,0].Consumers on Kotlin 2.1+ can depend on this release. 2.1 is the new floor, not "any version."
apiCheckpasses clean — no public API surface changed.Bumps to
1.0.0-beta20.