New versions are not compatible with gradle 6.x

[ArtemZip]

Describe the bug

After upgrading project from 2.18.2 to version 2.19.2 of swagger generator plugin, gradle 6.x is failing to build because of that issue

java.lang.AbstractMethodError: Receiver class org.hidetake.gradle.swagger.generator.codegen.GenerateOptions does not define or inherit an implementation of the resolved method abstract getProperty(Ljava/lang/String;)Ljava/lang/Object; of interface groovy.lang.GroovyObject.

Cannot update project to use newest gradle as other plugins doesn't support it yet

Environment

Plugin version: 2.18.2 -> 2.19.2
Swagger Codegen version: 3.0.33
Gradle version: 6.9
Java version: 11
OS: Windows