ci: uninstall some packages for v9 to avoid an npm inf. loop bug

Author: G-Rath

.github/workflows/verifications.yml

@@ -63,6 +63,10 @@ jobs:
       - name: Install dependencies
         run: npm install
 
+        # see https://github.com/npm/cli/issues/7349
+      - if: ${{ matrix.eslint == 9 }}
+        run: npm un eslint-plugin-jest eslint-doc-generator
+
       - name: Install ESLint v${{ matrix.eslint }}
         run: npm install --no-save --force eslint@${{ matrix.eslint }}