add artifact api twirp definitions

package.json

@@ -38,7 +38,9 @@
   },
   "dependencies": {
     "@actions/core": "^1.10.0",
-    "@actions/http-client": "^2.1.0"
+    "@actions/http-client": "^2.1.0",
+    "@protobuf-ts/plugin": "^2.2.3-alpha.1",
+    "twirp-ts": "^2.5.0"
   },
   "devDependencies": {
     "typescript": "^3.9.10"