Merge pull request #376 from eXist-db/dependabot/npm_and_yarn/gulp-autoprefixer-7.0.0

chore(deps-dev): bump gulp-autoprefixer from 6.1.0 to 7.0.0

Author: duncdrum

package-lock.json

@@ -34,7 +34,7 @@
     "cypress": "^3.4.1",
     "del": "^5.0.0",
     "gulp": "^4.0.2",
-    "gulp-autoprefixer": "^6.1.0",
+    "gulp-autoprefixer": "^7.0.0",
     "gulp-concat": "^2.6.1",
     "gulp-cssnano": "^2.1.3",
     "gulp-flatmap": "^1.0.2",