Bump koa from 3.0.1 to 3.0.3 in /examples/koa-http-server-ts

Bumps [koa](https://github.com/koajs/koa) from 3.0.1 to 3.0.3.
- [Release notes](https://github.com/koajs/koa/releases)
- [Changelog](https://github.com/koajs/koa/blob/master/History.md)
- [Commits](koajs/koa@v3.0.1...v3.0.3)

---
updated-dependencies:
- dependency-name: koa
  dependency-version: 3.0.3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

examples/koa-http-server-ts/package.json

@@ -13,7 +13,7 @@
   },
   "dependencies": {
     "@leapfrogtechnology/async-store": "^2.0.0",
-    "koa": "^3.0.1",
+    "koa": "^3.0.3",
     "koa-request": "^1.0.0",
     "nodemon": "^2.0.15",
     "qs": "^6.9.4"

examples/koa-http-server-ts/yarn.lock

@@ -903,10 +903,10 @@ koa-request@^1.0.0:
   dependencies:
     request "*"
 
-koa@^3.0.1:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/koa/-/koa-3.0.1.tgz#b211a0f350d1cc6185047671f8ef7e019c16351d"
-  integrity sha512-oDxVkRwPOHhGlxKIDiDB2h+/l05QPtefD7nSqRgDfZt8P+QVYFWjfeK8jANf5O2YXjk8egd7KntvXKYx82wOag==
+koa@^3.0.3:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/koa/-/koa-3.0.3.tgz#40a97b6da0c0d49a704af82db2b3e5a618ed9042"
+  integrity sha512-MeuwbCoN1daWS32/Ni5qkzmrOtQO2qrnfdxDHjrm6s4b59yG4nexAJ0pTEFyzjLp0pBVO80CZp0vW8Ze30Ebow==
   dependencies:
     accepts "^1.3.8"
     content-disposition "~0.5.4"