Bump @vercel/ncc from 0.27.0 to 0.28.6

Bumps [@vercel/ncc](https://github.com/vercel/ncc) from 0.27.0 to 0.28.6.
- [Release notes](https://github.com/vercel/ncc/releases)
- [Commits](vercel/ncc@0.27.0...0.28.6)

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

package.json

@@ -21,7 +21,7 @@
     "@octokit/types": "^6.14.2",
     "@octokit/webhooks": "^9.0.0",
     "@types/node": "^14.14.37",
-    "@vercel/ncc": "^0.27.0",
+    "@vercel/ncc": "^0.28.6",
     "ttypescript": "^1.5.12",
     "typescript": "^4.2.4"
   },

yarn.lock

@@ -882,10 +882,10 @@
     "@typescript-eslint/types" "4.26.0"
     eslint-visitor-keys "^2.0.0"
 
-"@vercel/ncc@^0.27.0":
-  version "0.27.0"
-  resolved "https://registry.yarnpkg.com/@vercel/ncc/-/ncc-0.27.0.tgz#c0cfeebb0bebb56052719efa4a0ecc090a932c76"
-  integrity sha512-DllIJQapnU2YwewIhh/4dYesmMQw3h2cFtabECc/zSJHqUbNa0eJuEkRa6DXbZvh1YPWBtYQoPV17NlDpBw1Vw==
+"@vercel/ncc@^0.28.6":
+  version "0.28.6"
+  resolved "https://registry.yarnpkg.com/@vercel/ncc/-/ncc-0.28.6.tgz#073c0ce8e0269210c0a9f180fb0bf949eecc20e0"
+  integrity sha512-t4BoSSuyK8BZaUE0gV18V6bkFs4st7baumtFGa50dv1tMu2GDBEBF8sUZaKBdKiL6DzJ2D2+XVCwYWWDcQOYdQ==
 
 abab@^2.0.3:
   version "2.0.5"