Update to Node.js 20.x

Node.js 16.x reaches its EOL next month. GitHub is migrating everything
to Node.js 20.x, so do we.

From now on, publish this action as v0.3.

.eslintrc.json

@@ -4,7 +4,7 @@
   "extends": ["plugin:github/recommended"],
   "parser": "@typescript-eslint/parser",
   "parserOptions": {
-    "ecmaVersion": 9,
+    "ecmaVersion": 2023,
     "sourceType": "module",
     "project": ["./src/tsconfig.json", "./tsconfig.test.json"]
   },
@@ -65,7 +65,7 @@
   },
   "env": {
     "node": true,
-    "es6": true
+    "es2022": true
   },
 
   "overrides": [

.github/workflows/ci.yaml

@@ -13,10 +13,10 @@ jobs:
     - name: Checkout
       uses: actions/[email protected]
 
-    - name: Set up Node.js 16.x
+    - name: Set up Node.js 20.x
       uses: actions/setup-node@v3
       with:
-        node-version: 16.x
+        node-version: 20.x
 
     - name: Install dependencies
       run: npm ci
@@ -39,4 +39,4 @@ jobs:
     - name: Update rolling release tag
       if: ${{ github.ref == 'refs/heads/main' }}
       run: |
-        git push origin HEAD:refs/tags/v0.2 --force
+        git push origin HEAD:refs/tags/v0.3 --force

README.md

@@ -93,7 +93,7 @@ jobs:
 ## Code in Main
 
 First, you'll need to have a reasonably modern version of `node` handy. The CI
-builds use Node 16, currently.
+builds use Node 20, currently.
 
 Install the dependencies
 

action.yaml

@@ -9,5 +9,5 @@ inputs:
     required: true
     description: The name of the workflow that should be re-run
 runs:
-  using: node16
+  using: node20
   main: dist/index.js

package.json

@@ -29,7 +29,8 @@
     "@octokit/webhooks-types": "^7"
   },
   "devDependencies": {
-    "@types/node": "^16",
+    "@tsconfig/node20": "^20",
+    "@types/node": "^20",
     "@typescript-eslint/eslint-plugin": "^6",
     "@typescript-eslint/parser": "^6",
     "@vercel/ncc": "~0.38",

tsconfig.common.json

@@ -1,5 +1,5 @@
 {
-  "extends": "@tsconfig/node16/tsconfig.json",
+  "extends": "@tsconfig/node20/tsconfig.json",
   "compilerOptions": {
     "composite": true
   }