feat: new /orgs/{org}/issue-types, /orgs/{org}/issue-types/{issue_type_id} enpoints, add issue type to responses, add dismissal request for code scanning for GHES and GHEC, description updates (#456)

WIP

Author: octokitbot

cache/api.github.com.json

@@ -16,6 +16,6 @@
   "author": "Gregor Martynus (https://twitter.com/gr2m)",
   "license": "MIT",
   "octokit": {
-    "openapi-version": "18.1.0"
+    "openapi-version": "18.2.0"
   }
 }

cache/ghec.json

@@ -16,6 +16,6 @@
   "author": "Gregor Martynus (https://twitter.com/gr2m)",
   "license": "MIT",
   "octokit": {
-    "openapi-version": "18.1.0"
+    "openapi-version": "18.2.0"
   }
 }