chore(deps): bump mobx from 6.8.0 to 6.13.3

Bumps [mobx](https://github.com/mobxjs/mobx) from 6.8.0 to 6.13.3.
- [Release notes](https://github.com/mobxjs/mobx/releases)
- [Commits](https://github.com/mobxjs/mobx/commits/[email protected])

---
updated-dependencies:
- dependency-name: mobx
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -135,7 +135,7 @@
     "lodash": "^4.17.19",
     "marked": "6.0.0",
     "mini-css-extract-plugin": "^2.8.0",
-    "mobx": "^6.8.0",
+    "mobx": "^6.13.3",
     "mobx-react": "~7.6.0",
     "mockdate": "3.0.5",
     "moment-timezone": "0.5.44",

yarn.lock

@@ -9227,10 +9227,10 @@ mobx-react@~7.6.0:
   dependencies:
     mobx-react-lite "^3.4.0"
 
-mobx@^6.8.0:
-  version "6.8.0"
-  resolved "https://registry.yarnpkg.com/mobx/-/mobx-6.8.0.tgz#59051755fdb5c8a9f3f2e0a9b6abaf86bab7f843"
-  integrity sha512-+o/DrHa4zykFMSKfS8Z+CPSEg5LW9tSNGTuN8o6MF1GKxlfkSHSeJn5UtgxvPkGgaouplnrLXCF+duAsmm6FHQ==
+mobx@^6.13.3:
+  version "6.13.3"
+  resolved "https://registry.yarnpkg.com/mobx/-/mobx-6.13.3.tgz#27f6171125fd4f737daec940c1d199c479f1b8c5"
+  integrity sha512-YtAS+ZMbdpbHYUU4ESht3na8KiX11KuMT1yOiKtbKlQ0GZkHDYPKyEw/Tdp7h7aHyLrTWj2TBaSNJ6bCr638iQ==
 
 [email protected]:
   version "3.0.5"