fix: package.json & yarn.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-KOACORS-6117545

package.json

@@ -58,7 +58,7 @@
   "dependencies": {
     "@kasa/koa-logging": "^0.3.0",
     "@kasa/koa-request-id": "^2.0.1",
-    "@koa/cors": "^3.1.0",
+    "@koa/cors": "^5.0.0",
     "dotenv": "^8.2.0",
     "elastic-apm-node": "^3.14.0",
     "got": "^9.6.0",

yarn.lock

@@ -709,10 +709,10 @@
     debug "^4.1.1"
     uuid "^3.3.2"
 
-"@koa/cors@^3.1.0":
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/@koa/cors/-/cors-3.1.0.tgz#618bb073438cfdbd3ebd0e648a76e33b84f3a3b2"
-  integrity sha512-7ulRC1da/rBa6kj6P4g2aJfnET3z8Uf3SWu60cjbtxTA5g8lxRdX/Bd2P92EagGwwAhANeNw8T8if99rJliR6Q==
+"@koa/cors@^5.0.0":
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/@koa/cors/-/cors-5.0.0.tgz#0029b5f057fa0d0ae0e37dd2c89ece315a0daffd"
+  integrity sha512-x/iUDjcS90W69PryLDIMgFyV21YLTnG9zOpPXS7Bkt2b8AsY3zZsIpOLBkYr9fBcF3HbkKaER5hOBZLfpLgYNw==
   dependencies:
     vary "^1.1.2"