Merge branch 'pr-2617'

[core] Deprecate missing language attribute on rule definition #2617

pmd-javascript/src/main/resources/category/ecmascript/bestpractices.xml

@@ -37,6 +37,7 @@ with (object) {
     </rule>
 
     <rule name="ConsistentReturn"
+          language="ecmascript"
           since="5.0"
           message="A function should not mix 'return' statements with and without a result."
           class="net.sourceforge.pmd.lang.ecmascript.rule.bestpractices.ConsistentReturnRule"