chore(build): Yarn 4 using Node.js Corepack

https://yarnpkg.com/blog/release/4.0

.github/workflows/node-ci.yml

@@ -6,11 +6,12 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v1
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
         with:
-          node-version: '16'
-      - run: yarn install --no-progress --frozen-lockfile
+          node-version: '20'
+      - run: corepack enable
+      - run: yarn install
       - run: yarn test
       - run: yarn build
       - uses: peaceiris/actions-gh-pages@v3

.yarnrc.yml

@@ -0,0 +1 @@
+nodeLinker: node-modules

package.json

@@ -3,6 +3,7 @@
   "version": "3.0.0",
   "description": "Add {{Location}} and {{Object location}} to images on Wikimedia Commons",
   "private": true,
+  "packageManager": "[email protected]",
   "type": "module",
   "main": "app/index.js",
   "scripts": {