Bump undefsafe from 2.0.2 to 2.0.5 in /backend

Bumps [undefsafe](https://github.com/remy/undefsafe) from 2.0.2 to 2.0.5.
- [Release notes](https://github.com/remy/undefsafe/releases)
- [Commits](remy/undefsafe@v2.0.2...v2.0.5)

---
updated-dependencies:
- dependency-name: undefsafe
  dependency-type: indirect
...

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

backend/yarn.lock

@@ -2559,11 +2559,9 @@ typedarray@^0.0.6:
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
 undefsafe@^2.0.2:
-  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/undefsafe/-/undefsafe-2.0.2.tgz#225f6b9e0337663e0d8e7cfd686fc2836ccace76"
-  integrity sha1-Il9rngM3Zj4Njnz9aG/Cg2zKznY=
-  dependencies:
-    debug "^2.2.0"
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/undefsafe/-/undefsafe-2.0.5.tgz#38733b9327bdcd226db889fb723a6efd162e6e2c"
+  integrity sha512-WxONCrssBM8TSPRqN5EmsjVrsv4A8X12J4ArBiiayv3DyyG3ZlIg6yysuuSYdZsVz3TKcTg2fd//Ujd4CHV1iA==
 
 union-value@^1.0.0:
   version "1.0.0"