Switch language version in Kotlin project to 1.8

Use kotlinx-metadata-jvm:0.5.0 that supports reading 1.8.0 kotlin metadata version

build.gradle.kts

@@ -74,7 +74,7 @@ val kotlinVersion by extra(
         } ?: buildNumber
 )
 
-val kotlinLanguageVersion by extra("1.7")
+val kotlinLanguageVersion by extra("1.8")
 
 extra["kotlin_root"] = rootDir
 

libraries/reflect/build.gradle.kts

@@ -12,7 +12,7 @@ description = "Kotlin Full Reflection Library"
 
 buildscript {
     dependencies {
-        classpath("org.jetbrains.kotlinx:kotlinx-metadata-jvm:0.4.1")
+        classpath("org.jetbrains.kotlinx:kotlinx-metadata-jvm:0.5.0")
     }
 }
 

libraries/tools/binary-compatibility-validator/build.gradle

@@ -7,6 +7,7 @@ configurations {
 
 dependencies {
     api("org.jetbrains.kotlinx:binary-compatibility-validator:0.9.0")
+    api("org.jetbrains.kotlinx:kotlinx-metadata-jvm:0.5.0")
 
     testApi project(':kotlin-test:kotlin-test-junit')