[LANG-1033] Add StringUtils.countMatches(CharSequence, char)

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@1616372 13f79535-47bb-0310-9956-ffa450edef68
Update plugins to current versions.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@1616373 13f79535-47bb-0310-9956-ffa450edef68