Bump jquery from 2.1.4 to 3.5.1 in /static/libs/simditor

Bumps [jquery](https://github.com/jquery/jquery) from 2.1.4 to 3.5.1.
- [Release notes](https://github.com/jquery/jquery/releases)
- [Commits](jquery/jquery@2.1.4...3.5.1)

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

Author: dependabot[bot]

static/libs/simditor/package.json

@@ -18,7 +18,7 @@
   "main": "lib/simditor.js",
   "homepage": "http://simditor.tower.im",
   "dependencies": {
-    "jquery": "~2.1.4",
+    "jquery": "~3.5.1",
     "simple-hotkeys": "~1.0.3",
     "simple-uploader": "~2.0.7",
     "simple-module": "~2.0.6"