chore(deps): bump koa and @types/koa (#6524)

Bumps [koa](https://github.com/koajs/koa) and [@types/koa](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/koa). These dependencies needed to be updated together.

Updates `koa` from 2.14.2 to 2.15.0
- [Changelog](https://github.com/koajs/koa/blob/2.15.0/History.md)
- [Commits](https://github.com/koajs/koa/compare/2.14.2...2.15.0)

Updates `@types/koa` from 2.13.6 to 2.14.0
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/koa)

---
updated-dependencies:
- dependency-name: koa
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: "@types/koa"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

yarn.lock

@@ -3120,10 +3120,10 @@
   dependencies:
     koa-useragent "*"
 
-"@types/koa@*", "@types/koa@^2.13.1", "@types/koa@^2.13.5", "@types/koa@^2.13.6":
-  version "2.13.6"
-  resolved "https://registry.yarnpkg.com/@types/koa/-/koa-2.13.6.tgz#6dc14e727baf397310aa6f414ebe5d144983af42"
-  integrity "sha1-bcFOcnuvOXMQqm9BTr5dFEmDr0I= sha512-diYUfp/GqfWBAiwxHtYJ/FQYIXhlEhlyaU7lB/bWQrx4Il9lCET5UwpFy3StOAohfsxxvEQ11qIJgT1j2tfBvw=="
+"@types/koa@*", "@types/koa@^2.13.1", "@types/koa@^2.13.5", "@types/koa@^2.14.0":
+  version "2.14.0"
+  resolved "https://registry.yarnpkg.com/@types/koa/-/koa-2.14.0.tgz#8939e8c3b695defc12f2ef9f38064509e564be18"
+  integrity sha512-DTDUyznHGNHAl+wd1n0z1jxNajduyTh8R53xoewuerdBzGo6Ogj6F2299BFtrexJw4NtgjsI5SMPCmV9gZwGXA==
   dependencies:
     "@types/accepts" "*"
     "@types/content-disposition" "*"
@@ -5014,10 +5014,10 @@ cookie@~0.4.1:
   resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.4.1.tgz#afd713fe26ebd21ba95ceb61f9a8116e50a537d1"
   integrity "sha1-r9cT/ibr0hupXOth+agRblClN9E= sha512-ZwrFkGJxUR3EIoXtO+yVE69Eb7KlixbaeAWfBQB9vVsNn/o+Yw69gBWSSDK825hQNdN+wF8zELf3dFNl/kxkUA=="
 
-cookies@~0.8.0:
-  version "0.8.0"
-  resolved "https://registry.yarnpkg.com/cookies/-/cookies-0.8.0.tgz#1293ce4b391740a8406e3c9870e828c4b54f3f90"
-  integrity "sha1-EpPOSzkXQKhAbjyYcOgoxLVPP5A= sha512-8aPsApQfebXnuI+537McwYsDtjVxGm8gTIzQI3FDW6t5t/DAhERxtnbEPN/8RX+uZthoz4eCOgloXaE5cYyNow=="
+cookies@~0.9.0:
+  version "0.9.1"
+  resolved "https://registry.yarnpkg.com/cookies/-/cookies-0.9.1.tgz#3ffed6f60bb4fb5f146feeedba50acc418af67e3"
+  integrity sha512-TG2hpqe4ELx54QER/S3HQ9SRVnQnGBtKUz5bLQWtYAQ+o6GpgMs6sYUvaiJjVxb+UXwhRhAEP3m7LbsIZ77Hmw==
   dependencies:
     depd "~2.0.0"
     keygrip "~1.1.0"
@@ -9006,16 +9006,16 @@ koa-views@^7.0.1:
     pretty "^2.0.0"
     resolve-path "^1.4.0"
 
-koa@^2.13.1, koa@^2.14.2:
-  version "2.14.2"
-  resolved "https://registry.yarnpkg.com/koa/-/koa-2.14.2.tgz#a57f925c03931c2b4d94b19d2ebf76d3244863fc"
-  integrity "sha1-pX+SXAOTHCtNlLGdLr920yRIY/w= sha512-VFI2bpJaodz6P7x2uyLiX6RLYpZmOJqNmoCst/Yyd7hQlszyPwG/I9CQJ63nOtKSxpt5M7NH67V6nJL2BwCl7g=="
+koa@^2.13.1, koa@^2.15.0:
+  version "2.15.0"
+  resolved "https://registry.yarnpkg.com/koa/-/koa-2.15.0.tgz#d24ae1b0ff378bf12eb3df584ab4204e4c12ac2b"
+  integrity sha512-KEL/vU1knsoUvfP4MC4/GthpQrY/p6dzwaaGI6Rt4NQuFqkw3qrvsdYF5pz3wOfi7IGTvMPHC9aZIcUKYFNxsw==
   dependencies:
     accepts "^1.3.5"
     cache-content-type "^1.0.0"
     content-disposition "~0.5.2"
     content-type "^1.0.4"
-    cookies "~0.8.0"
+    cookies "~0.9.0"
     debug "^4.3.2"
     delegates "^1.0.0"
     depd "^2.0.0"