checkstyle: update meta

      adheres to a coding standard. By default it supports the Sun Code

      Conventions, but is highly configurable.

    '';

    homepage = "http://checkstyle.sourceforge.net/";

    homepage = "https://checkstyle.org/";

    changelog = "https://checkstyle.org/releasenotes.html#Release_${version}";

    sourceProvenance = with sourceTypes; [ binaryBytecode ];

    license = licenses.lgpl21;

    maintainers = with maintainers; [ pSub ];