chore: Require node 10

BREAKING CHANGE: Ensure you use node 10.13.0 or newer before upgrading to this grunt-webpack version

.travis.yml

@@ -1,27 +1,15 @@
 language: node_js
-sudo: false
 node_js:
-  - "11"
-  - "8"
-  - "6"
-env:
-  - JOB=test
+  - "14"
+  - "12"
+  - "10"
 cache:
   yarn: true
-  directories:
-    - "node_modules"
 matrix:
-  fast_finish: true
   include:
     - node_js: "lts/*"
-      env: JOB=lint
-    - node_js: "10"
-      env: JOB=test-coverage
-before_script:
-  - 'if [[ -n "$TRAVIS_TAG" ]] && [[ "$TRAVIS_JOB_NUMBER" == *.1 ]]; then yarn run create-github-release; fi'
-script:
-  - 'if [ "$JOB" = "lint" ]; then yarn run lint ; fi'
-  - 'if [ "$JOB" = "test" ]; then yarn run test-only ; fi'
-  - 'if [ "$JOB" = "test-coverage" ]; then yarn run test-coverage ; fi'
-after_success:
- - 'if [ "$JOB" = "test-coverage" ]; then bash <(curl -s https://codecov.io/bash) -f coverage/coverage-final.json ; fi'
+      script: yarn lint
+    - node_js: "lts/*"
+      script: yarn test-coverage
+      after_success: bash <(curl -s https://codecov.io/bash)
+script: yarn test-only

package.json

@@ -14,7 +14,7 @@
     "url": "https://github.com/webpack-contrib/grunt-webpack/issues"
   },
   "engines": {
-    "node": ">=6.11.5"
+    "node": ">=10.13.0"
   },
   "files": [
     "src",