Bump async-mutex from 0.4.0 to 0.5.0 in /backend

Bumps [async-mutex](https://github.com/DirtyHairy/async-mutex) from 0.4.0 to 0.5.0.
- [Changelog](https://github.com/DirtyHairy/async-mutex/blob/master/CHANGELOG.md)
- [Commits](https://github.com/DirtyHairy/async-mutex/compare/v0.4.0...v0.5.0)

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

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

backend/package-lock.json

@@ -13,7 +13,7 @@
         "@discordjs/core": "^0.5.2",
         "archiver": "^5.3.1",
         "async": "^3.2.3",
-        "async-mutex": "^0.4.0",
+        "async-mutex": "^0.5.0",
         "axios": "^0.21.2",
         "bcryptjs": "^2.4.0",
         "command-exists": "^1.2.9",
@@ -583,9 +583,9 @@
       "integrity": "sha512-spZRyzKL5l5BZQrr/6m/SqFdBN0q3OCI0f9rjfBzCMBIP4p75P620rR3gTmaksNOhmzgdxcaxdNfMy6anrbM0g=="
     },
     "node_modules/async-mutex": {
-      "version": "0.4.0",
-      "resolved": "https://registry.npmjs.org/async-mutex/-/async-mutex-0.4.0.tgz",
-      "integrity": "sha512-eJFZ1YhRR8UN8eBLoNzcDPcy/jqjsg6I1AP+KvWQX80BqOSW1oJPJXDylPUEeMr2ZQvHgnQ//Lp6f3RQ1zI7HA==",
+      "version": "0.5.0",
+      "resolved": "https://registry.npmjs.org/async-mutex/-/async-mutex-0.5.0.tgz",
+      "integrity": "sha512-1A94B18jkJ3DYq284ohPxoXbfTA5HsQ7/Mf4DEhcyLx3Bz27Rh59iScbB6EPiP+B+joue6YCxcMXSbFC1tZKwA==",
       "dependencies": {
         "tslib": "^2.4.0"
       }

backend/package.json

@@ -27,7 +27,7 @@
     "@discordjs/core": "^0.5.2",
     "archiver": "^5.3.1",
     "async": "^3.2.3",
-    "async-mutex": "^0.4.0",
+    "async-mutex": "^0.5.0",
     "axios": "^0.21.2",
     "bcryptjs": "^2.4.0",
     "command-exists": "^1.2.9",