Fix jsstyle error

lib/filters/ext_filter.js

@@ -101,7 +101,7 @@ ExtensibleFilter.prototype.matches = function (target) {
           attribute: self.matchType,
           initial: self.initial ? self.initial.toLowerCase() : undefined,
           any: self.any ? self.any.map(function (a) {
-            return a.toLowerCase()
+            return a.toLowerCase();
           }) : undefined,
           'final': self['final'] ? self['final'].toLowerCase() : undefined
         };