Update all major dependencies

Author: renovate-bot

package.json

@@ -27,10 +27,10 @@
     "browser-sync": "2.26.14",
     "cz-customizable": "6.2.1",
     "gulp": "4.0.2",
-    "gulp-autoprefixer": "7.0.1",
+    "gulp-autoprefixer": "8.0.0",
     "gulp-babel": "8.0.0",
-    "gulp-postcss": "8.0.0",
-    "gulp-rename": "1.4.0",
+    "gulp-postcss": "9.0.0",
+    "gulp-rename": "2.0.0",
     "gulp-sass": "4.0.2",
     "gulp-uglify": "3.0.2",
     "postcss-cssnext": "3.1.0"