Commit to using only yarn

.github/workflows/ci.yaml

@@ -16,14 +16,10 @@ jobs:
     - uses: actions/checkout@v3
     - uses: actions/setup-node@v3
     - uses: bahmutov/npm-install@v1
-    - name: If this step fails run 'npm run lint' and 'npm run format' then commit again.
+    - name: If this step fails run 'yarn lint' and 'yarn format' then commit again.
       run: |
-        PACKAGE_MANAGER=npm
-        if [ -f "./yarn.lock" ]; then
-            PACKAGE_MANAGER=yarn
-        fi
-        $PACKAGE_MANAGER run lint:check
-        $PACKAGE_MANAGER run format:check
+        yarn lint:check
+        yarn format:check
   test:
     runs-on: ${{ matrix.os }}
     needs: test_lint
@@ -33,24 +29,14 @@ jobs:
         os: [ windows-latest, ubuntu-latest ]
     name: Test with Node v${{ matrix.node }} on ${{ matrix.os }}
     steps:
-    - name: Tell if project is using npm or yarn
-      id: step1
-      uses: garronej/ts-ci@v2.0.2
-      with: 
-        action_name: tell_if_project_uses_npm_or_yarn
     - uses: actions/checkout@v3
     - uses: actions/setup-node@v3
       with:
         node-version: ${{ matrix.node }}
     - uses: bahmutov/npm-install@v1
-    - if: steps.step1.outputs.npm_or_yarn == 'yarn'
-      run: |
-        yarn build
-        yarn test
-    - if: steps.step1.outputs.npm_or_yarn == 'npm'
-      run: |
-        npm run build
-        npm test
+    - run: yarn build
+    - run: yarn test
+
   check_if_version_upgraded:
     name: Check if version upgrade
     # We run this only if it's a push on the default branch or if it's a PR from a 
@@ -110,12 +96,7 @@ jobs:
       with:
         registry-url: https://registry.npmjs.org/
     - uses: bahmutov/npm-install@v1
-    - run: |
-        PACKAGE_MANAGER=npm
-        if [ -f "./yarn.lock" ]; then
-            PACKAGE_MANAGER=yarn
-        fi
-        $PACKAGE_MANAGER run build
+    - run: yarn build
     - run: npx -y -p denoify@1.2.2 enable_short_npm_import_path
       env:
         DRY_RUN: "0"