Bump moment from 2.27.0 to 2.29.4 in /backend

Bumps [moment](https://github.com/moment/moment) from 2.27.0 to 2.29.4.
- [Release notes](https://github.com/moment/moment/releases)
- [Changelog](https://github.com/moment/moment/blob/develop/CHANGELOG.md)
- [Commits](moment/moment@2.27.0...2.29.4)

---
updated-dependencies:
- dependency-name: moment
  dependency-type: direct:production
...

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

Author: dependabot[bot]

backend/package.json

@@ -19,7 +19,7 @@
 		"knex": "^0.20.13",
 		"liquidjs": "^9.11.10",
 		"lodash": "^4.17.21",
-		"moment": "^2.24.0",
+		"moment": "^2.29.4",
 		"mysql": "^2.18.1",
 		"node-rsa": "^1.0.8",
 		"nodemon": "^2.0.2",

backend/yarn.lock

@@ -2271,10 +2271,10 @@ mkdirp@^0.5.1, mkdirp@^0.5.3, mkdirp@^0.5.5:
   dependencies:
     minimist "^1.2.5"
 
-moment@^2.24.0:
-  version "2.27.0"
-  resolved "https://registry.yarnpkg.com/moment/-/moment-2.27.0.tgz#8bff4e3e26a236220dfe3e36de756b6ebaa0105d"
-  integrity sha512-al0MUK7cpIcglMv3YF13qSgdAIqxHTO7brRtaz3DlSULbqfazqkc5kEjNrLDOM7fsjshoFIihnU8snrP7zUvhQ==
+moment@^2.29.4:
+  version "2.29.4"
+  resolved "https://registry.yarnpkg.com/moment/-/moment-2.29.4.tgz#3dbe052889fe7c1b2ed966fcb3a77328964ef108"
+  integrity sha512-5LC9SOxjSc2HF6vO2CyuTDNivEdoz2IvyJJGj6X8DJ0eFyfszE0QiEd+iXmBvUP3WHxSjFH/vIsA0EN00cgr8w==
 
 [email protected]:
   version "2.0.0"