Update README.md to require Kotlin 1.5.30 or newer

Abduqodiri Qurbonzoda · qurbonzoda · commit e8e01589675f · 2021-10-07T11:28:54.000+03:00
diff --git a/README.md b/README.md
@@ -25,7 +25,7 @@ the hoods to run benchmarks on JVM.
 
 Gradle 6.8 or newer
 
-Kotlin 1.4.30 or newer
+Kotlin 1.5.30 or newer
 
 # Gradle plugin
 
