chore(deps): update plugin com.github.johnrengelman.shadow to v8#39

BFergerson merged 1 commit intomastersourceplusplus/example-jvm:masterfrom

renovate/com.github.johnrengelman.shadow-8.xsourceplusplus/example-jvm:renovate/com.github.johnrengelman.shadow-8.xCopy head branch name to clipboard