Yarn 4 Upgrade

Author: elwayman02

.github/workflows/ci.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Install Node
         uses: volta-cli/action@v4
       - name: Install Dependencies
-        run: yarn install --frozen-lockfile
+        run: yarn install --immutable
       - name: Lint
         run: yarn lint
       - name: Run Tests
@@ -37,8 +37,10 @@ jobs:
       - uses: actions/checkout@v4
       - name: Install Node
         uses: volta-cli/action@v4
+      - name: Yarn Upgrade
+        run: yarn upgrade
       - name: Install Dependencies
-        run: yarn install --no-lockfile
+        run: yarn install
       - name: Run Tests
         run: yarn test:ember
 
@@ -71,6 +73,6 @@ jobs:
       - name: Install Node
         uses: volta-cli/action@v4
       - name: Install Dependencies
-        run: yarn install --frozen-lockfile
+        run: yarn install --immutable
       - name: Run Tests
         run: ./node_modules/.bin/ember try:one ${{ matrix.try-scenario }}

.gitignore

@@ -21,5 +21,16 @@
 /package-lock.json.ember-try
 /yarn.lock.ember-try
 
+# yarn@3 ignored files
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions
+# wrapper file to inject environment variables into yarn
+!.yarn/setup-env.cjs
+
 # broccoli-debug
 /DEBUG/

.yarnrc.yml

@@ -0,0 +1,3 @@
+enableGlobalCache: true
+
+nodeLinker: node-modules

package.json

@@ -96,7 +96,7 @@
   },
   "volta": {
     "node": "18.12.0",
-    "yarn": "1.22.19"
+    "yarn": "4.3.1"
   },
   "publishConfig": {
     "registry": "https://registry.npmjs.org"