Test on Node 18 and drop EOL Node 10

* Updated lock-file to fix https://github.com/npm/cli/issues/4859.
* Updated integration-tests to webpack 5 to fix
  https://github.com/webpack/webpack/issues/14532.
* Added `mode` to webpack-integration-tests to avoid
  the warning `The 'mode' option has not been set...`.
* Replaced outdated `grunt-bg-shell`-package to get rid of
  coffee-script warnings

.github/workflows/ci.yml

@@ -58,7 +58,7 @@ jobs:
       matrix:
         operating-system: ['ubuntu-latest', 'windows-latest']
         # https://nodejs.org/en/about/releases/
-        node-version: ['10', '12', '14', '16', '17']
+        node-version: ['12', '14', '16', '18']
 
     steps:
       - name: Checkout
@@ -78,8 +78,6 @@ jobs:
         run: npm run test
 
       - name: Test (Integration)
-        # https://github.com/webpack/webpack/issues/14532
-        if: ${{ matrix.node-version != '17' }}
         run: |
           cd ./tests/integration/rollup-test && ./test.sh && cd -
           cd ./tests/integration/webpack-babel-test && ./test.sh && cd -