Bump to v4.6.0.

_replaceHolders.js

@@ -13,14 +13,14 @@ var PLACEHOLDER = '__lodash_placeholder__';
 function replaceHolders(array, placeholder) {
   var index = -1,
       length = array.length,
-      resIndex = -1,
+      resIndex = 0,
       result = [];
 
   while (++index < length) {
     var value = array[index];
     if (value === placeholder || value === PLACEHOLDER) {
       array[index] = PLACEHOLDER;
-      result[++resIndex] = index;
+      result[resIndex++] = index;
     }
   }
   return result;