Bump sortablejs from 1.12.0 to 1.13.0

Bumps [sortablejs](https://github.com/SortableJS/Sortable) from 1.12.0 to 1.13.0.
- [Release notes](https://github.com/SortableJS/Sortable/releases)
- [Commits](https://github.com/SortableJS/Sortable/commits/1.13.0)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -15,7 +15,7 @@
     "jstree": "^3.3.11",
     "opensans-webkit": "^1.1.0",
     "popper.js": "^1.16.1",
-    "sortablejs": "^1.12.0",
+    "sortablejs": "^1.13.0",
     "underscore": "^1.12.0",
     "vis": "^4.21.0",
     "webpack-merge": "^5.7.3"

yarn.lock

@@ -6956,10 +6956,10 @@ sort-keys@^1.0.0:
   dependencies:
     is-plain-obj "^1.0.0"
 
-sortablejs@^1.12.0:
-  version "1.12.0"
-  resolved "https://registry.yarnpkg.com/sortablejs/-/sortablejs-1.12.0.tgz#ee6d7ece3598c2af0feb1559d98595e5ea37cbd6"
-  integrity sha512-bPn57rCjBRlt2sC24RBsu40wZsmLkSo2XeqG8k6DC1zru5eObQUIPPZAQG7W2SJ8FZQYq+BEJmvuw1Zxb3chqg==
+sortablejs@^1.13.0:
+  version "1.13.0"
+  resolved "https://registry.yarnpkg.com/sortablejs/-/sortablejs-1.13.0.tgz#3ab2473f8c69ca63569e80b1cd1b5669b51269e9"
+  integrity sha512-RBJirPY0spWCrU5yCmWM1eFs/XgX2J5c6b275/YyxFRgnzPhKl/TDeU2hNR8Dt7ITq66NRPM4UlOt+e5O4CFHg==
 
 source-list-map@^2.0.0:
   version "2.0.1"