Test on Node 18 and drop EOL Node 10

* Updated lock-file to fix npm/cli#4859.
* Updated integration-tests to webpack 5 to fix
  webpack/webpack#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* Replaced outdated `grunt-bg-shell`-package to get rid of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 -

Gruntfile.js

@@ -111,11 +111,9 @@ module.exports = function(grunt) {
       }
     },
 
-    bgShell: {
+    shell: {
       integrationTests: {
-        cmd: './tests/integration/run-integration-tests.sh',
-        bg: false,
-        fail: true
+        command: './tests/integration/run-integration-tests.sh'
       }
     },
 
@@ -139,7 +137,7 @@ module.exports = function(grunt) {
   grunt.loadNpmTasks('grunt-contrib-uglify');
   grunt.loadNpmTasks('grunt-contrib-watch');
   grunt.loadNpmTasks('grunt-babel');
-  grunt.loadNpmTasks('grunt-bg-shell');
+  grunt.loadNpmTasks('grunt-shell');
   grunt.loadNpmTasks('grunt-webpack');
 
   grunt.task.loadTasks('tasks');
@@ -156,7 +154,7 @@ module.exports = function(grunt) {
   // Requires secret properties from .travis.yaml
   grunt.registerTask('extensive-tests-and-publish-to-aws', [
     'default',
-    'bgShell:integrationTests',
+    'shell:integrationTests',
     'metrics',
     'publish-to-aws'
   ]);
@@ -176,6 +174,6 @@ module.exports = function(grunt) {
   );
   grunt.registerTask('integration-tests', [
     'default',
-    'bgShell:integrationTests'
+    'shell:integrationTests'
   ]);
 };

README.markdown

@@ -81,7 +81,7 @@ Supported Environments
 
 Handlebars has been designed to work in any ECMAScript 3 environment. This includes
 
-- Node.js 10+
+- Node.js 12+
 - Chrome
 - Firefox
 - Safari 5+