fix: upgrade mime from 2.4.6 to 2.6.0 (#469)

Snyk has created this PR to upgrade mime from 2.4.6 to 2.6.0.

See this package in npm:
https://www.npmjs.com/package/mime

See this project in Snyk:
https://app.snyk.io/org/jupe/project/89137d2b-8d19-4840-b8f3-d0a8d93b8f9e?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -63,7 +63,7 @@
     "jwt-simple": "^0.5.6",
     "lodash": "^4.17.21",
     "method-override": "^3.0.0",
-    "mime": "^2.4.6",
+    "mime": "^2.6.0",
     "moment": "^2.27.0",
     "mongodb-memory-server": "^6.9.2",
     "mongoose": "^5.7.5",