Maven Badge
Examples
/maven/v/maven-central/:group/:artifact
/maven/v/maven-central/com.google.code.gson/gson
version (maven-central)
/maven/v/metadata-url/:path+
/maven/v/metadata-url/https/repo1.maven.org/maven2/com/google/code/gson/gson/maven-metadata.xml
version (maven metadata url)