Change postfix increment operators to prefix.

lodash.js

@@ -1082,7 +1082,7 @@
 
     while (length--) {
       if (array[length] === placeholder) {
-        result++;
+        ++result;
       }
     }
     return result;
@@ -1346,7 +1346,7 @@
   function unicodeSize(string) {
     var result = reUnicode.lastIndex = 0;
     while (reUnicode.test(string)) {
-      result++;
+      ++result;
     }
     return result;
   }