UPDATE_KOTLIN_VERSION: 1.8.0

Kotlin 1.8.0-RC2 and 1.8.0 are based on exactly the same commit.
diff --git a/gradle.properties b/gradle.properties
index 5c5a803..183496c 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,7 +1,7 @@
 # Copied from kotlinc
 org.gradle.jvmargs=-Duser.country=US -Dkotlin.daemon.jvm.options=-Xmx2200m -Dfile.encoding=UTF-8
 
-kotlinBaseVersion=1.8.0-RC2
+kotlinBaseVersion=1.8.0
 agpBaseVersion=7.0.0
 intellijVersion=203.8084.24
 junitVersion=4.12