fix(deps): update dependency @octokit/auth-oauth-app to v6 (#491)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -23,7 +23,7 @@
   "author": "Gregor Martynus (https://github.com/gr2m)",
   "license": "MIT",
   "dependencies": {
-    "@octokit/auth-oauth-app": "^5.0.0",
+    "@octokit/auth-oauth-app": "^6.0.0",
     "@octokit/auth-oauth-user": "^2.0.0",
     "@octokit/request": "^6.0.0",
     "@octokit/request-error": "^3.0.0",