update bootstrap to version 4.3.1

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "8da1fe9aabe6c20d116a21f63fff8ac2",
+    "content-hash": "f4dce457cd65f92a26d8197617f2f560",
     "packages": [
         {
             "name": "blueimp/jquery-file-upload",
@@ -1206,16 +1206,16 @@
         },
         {
             "name": "twbs/bootstrap",
-            "version": "v4.1.3",
+            "version": "v4.3.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/twbs/bootstrap.git",
-                "reference": "3b558734382ce58b51e5fc676453bfd53bba9201"
+                "reference": "8fa0d3010112dca5dd6dd501173415856001ba8b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/twbs/bootstrap/zipball/3b558734382ce58b51e5fc676453bfd53bba9201",
-                "reference": "3b558734382ce58b51e5fc676453bfd53bba9201",
+                "url": "https://api.github.com/repos/twbs/bootstrap/zipball/8fa0d3010112dca5dd6dd501173415856001ba8b",
+                "reference": "8fa0d3010112dca5dd6dd501173415856001ba8b",
                 "shasum": ""
             },
             "replace": {
@@ -1253,7 +1253,7 @@
                 "sass",
                 "web"
             ],
-            "time": "2018-07-24T15:54:34+00:00"
+            "time": "2019-02-13T16:01:40+00:00"
         }
     ],
     "packages-dev": [