Use GHA node16 rather than Docker

Author: mxcl

Dockerfile

@@ -16,6 +16,9 @@ inputs:
       If unset we use `$GTD_TODAY`.
     required: false
 runs:
-  using: docker
-  image: Dockerfile
-  # ^^ because we want node 16 so we can use modern features
+  using: node16
+  main: dist/index.js
+
+branding:
+  icon: check-square
+  color: green

action.yml

@@ -11,9 +11,9 @@
     "@actions/github": "^5.0.0",
     "@types/marked": "^3.0.2",
     "@types/node": "^16.11.6",
-    "typescript": "^4.4.3",
-    "@vercel/ncc": "^0.31.1",
-    "ts-node": "^10.3.1"
+    "@vercel/ncc": "^0.33.1",
+    "ts-node": "^10.3.1",
+    "typescript": "^4.4.3"
   },
   "type": "module"
 }