Replace toPairs with keys in getMatchData.

lodash.js

@@ -5389,11 +5389,14 @@
      * @returns {Array} Returns the match data of `object`.
      */
     function getMatchData(object) {
-      var result = toPairs(object),
+      var result = keys(object),
           length = result.length;
 
       while (length--) {
-        result[length][2] = isStrictComparable(result[length][1]);
+        var key = result[length],
+            value = object[key];
+
+        result[length] = [key, value, isStrictComparable(value)];
       }
       return result;
     }