JAVA 8 support for the plugin

[riterdando]

Describe the feature

The latest release of the plugin uses JAVA 11 but some projects I work on, still are using JAVA 8.
I am using Gradle 7 in my build with JAVA 8 but now your plugin is not working in this setup.

I did a local checkout and test building the plugin using JAVA 8.
My modifications to build.gradle are simple:

sourceCompatibility = '1.8'
targetCompatibility = '1.8'

Building and testing, using the above settings were successful.

Why do you want the feature?

Archieve compatibility with builds, still running JAVA 8.

Can you provide a version of the plugin being compatible with JAVA 8?

[mywill]

Having the same issue on legacy projects that are stuck on java 8 with versions > 2.18.2

[cmagnuson]

I'm also having the same issue on legacy projects.

I changed source/target compatibility and all tests passed, opened PR #295 with these changes

[int128]

Merged #295