Add isArray to _util.jst.

lib/fp/template/modules/_util.jst

@@ -3,6 +3,7 @@ module.exports = {
   'cloneDeep': require('../cloneDeep'),
   'curry': require('../curry'),
   'forEach': require('../_arrayEach'),
+  'isArray': require('../isArray'),
   'isFunction': require('../isFunction'),
   'iteratee': require('../iteratee'),
   'keys': require('../_baseKeys'),