muddler 0.12 released. https://github.com/demonnic/muddler/releases/tag/0.12
no longer makes any file changes if there's no src directory to build a package from
now ensures the write buffer for the XML file is flushed before it creates the zip file, at least one person was getting 0byte XML files
updated to latest version of groovy, gradle, and had updated to be compatible with jdks 8, 11, 17, and 18.. probably 15 too but I didn't test that one.
docker image now uses eclipse:temurin's jdk18 image, as adoptopenjdk is deprecated and this way I know it works with newer JDKs