Update version of Gradle

[grv87]

Could you update Gradle?
I can't use plugin from statically-compiled Groovy or Java with this error:

General error during instruction selection: java.lang.NoClassDefFoundError: Unable to load class de.gliderpilot.gradle.semanticrelease.UpdateGithubRelease due to missing dependency org/gradle/api/internal/DynamicObject

Google says that this problem arises since Gradle 3.0.
My Gradle is 4.3.1.
Is there a reason to still support Gradle 2.x?