update deps

node_modules/bootstrap/scss/_input-group.scss

@@ -16,10 +16,8 @@
   > .custom-select,
   > .custom-file {
     position: relative; // For focus state's z-index
-    flex: 1 1 auto;
-    // Add width 1% and flex-basis auto to ensure that button will not wrap out
-    // the column. Applies to IE Edge+ and Firefox. Chrome does not require this.
-    width: 1%;
+    flex: 1 1 0%;
+    min-width: 0; // https://stackoverflow.com/questions/36247140/why-dont-flex-items-shrink-past-content-size
     margin-bottom: 0;
 
     + .form-control,