java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException: Bad language version: 180

[jlccaires]

I am getting this error when run :webResourceInstallBowerDependencies, can anyone help me?

:webResourceInstallBowerDependencies FAILED

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':webResourceInstallBowerDependencies'.

java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException: Bad language version: 180

[jlccaires]

I have found the problem: I am using another plugin that combine css and js files into one. This plugin uses a older version of Rhino what is incompatible with version required by gradle-web-resource-plugin.
I don't know why gradle does not resolve this.

[jlccaires]

Is there a feature to combine css and js files on this lib?