Drop support for yarn, add Node v20 to CI

Signed-off-by: Matteo Collina <hello@matteocollina.com>

.github/workflows/ci.yml

@@ -38,7 +38,7 @@ jobs:
       contents: read
     strategy:
       matrix:
-        node-version: [14, 16, 18]
+        node-version: [14, 16, 18, 20]
         os: [macos-latest, ubuntu-latest, windows-latest]
         exclude:
           - os: windows-latest

.github/workflows/package-manager-ci.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        node-version: [14, 16, 18]
+        node-version: [18, 20]
     steps:
       - uses: actions/checkout@v3
       - name: Use Node.js ${{ matrix.node-version }}
@@ -31,32 +31,3 @@ jobs:
       - name: Tests
         shell: bash
         run: pnpm run test:ci
-
-  yarn-pnp:
-    name: yarn-pnp package manager on ${{ matrix.node-version }} ${{ matrix.os }}
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-latest]
-        node-version: [14, 16, 18]
-    steps:
-      - uses: actions/checkout@v3
-      - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
-        with:
-          node-version: ${{ matrix.node-version }}
-      - name: Use yarn
-        run: |
-          npm install -g yarn
-          yarn set version berry
-          cat test/yarnrc.yml >> .yarnrc.yml
-          yarn add -D pino-elasticsearch@^6.0.0
-          yarn install
-        env:
-          # needed due the yarn.lock file in repository's .gitignore
-          YARN_ENABLE_IMMUTABLE_INSTALLS: 'false'
-      - name: Tests
-        shell: bash
-        run: yarn run test:yarn
-        env:
-          SKIP_PROCESS_EXIT_CHECK: 'true'