chore(select2): bump version to 4.0.13

Author: jgmontoya

vendor/assets/select2/select2.css

@@ -188,16 +188,13 @@
     width: 100%; }
     .select2-container--default .select2-selection--multiple .select2-selection__rendered li {
       list-style: none; }
-  .select2-container--default .select2-selection--multiple .select2-selection__placeholder {
-    color: #999;
-    margin-top: 5px;
-    float: left; }
   .select2-container--default .select2-selection--multiple .select2-selection__clear {
     cursor: pointer;
     float: right;
     font-weight: bold;
     margin-top: 5px;
-    margin-right: 10px; }
+    margin-right: 10px;
+    padding: 1px; }
   .select2-container--default .select2-selection--multiple .select2-selection__choice {
     background-color: #e4e4e4;
     border: 1px solid #aaa;
@@ -216,7 +213,7 @@
     .select2-container--default .select2-selection--multiple .select2-selection__choice__remove:hover {
       color: #333; }
 
-.select2-container--default[dir="rtl"] .select2-selection--multiple .select2-selection__choice, .select2-container--default[dir="rtl"] .select2-selection--multiple .select2-selection__placeholder, .select2-container--default[dir="rtl"] .select2-selection--multiple .select2-search--inline {
+.select2-container--default[dir="rtl"] .select2-selection--multiple .select2-selection__choice, .select2-container--default[dir="rtl"] .select2-selection--multiple .select2-search--inline {
   float: right; }
 
 .select2-container--default[dir="rtl"] .select2-selection--multiple .select2-selection__choice {