fix(dependencies): make browserslists an own dependecy

The dependency "browserslist" is used in /tasks/config/tasks.js.

However, it does not (directly) depend on "browserslist". Instead, browserslist is just pulled in via "gulp-autoprefixer"

This PR adds the dependency directly

package.json

@@ -29,15 +29,9 @@
     "changelog": "auto-changelog -p"
   },
   "dependencies": {
-    "jquery": "^3.4.0",
     "@octokit/rest": "^16.16.0",
-    "gulp-concat-filenames": "^1.2.0",
-    "gulp-debug": "^4.0.0",
-    "gulp-git": "^2.9.0",
-    "gulp-tap": "^1.0.1",
-    "less": "^3.7.1 || ^4.0.0",
-    "merge-stream": "^2.0.0",
     "better-console": "1.0.1",
+    "browserslist": "^4.19.1",
     "del": "^3.0.0",
     "extend": "^3.0.2",
     "gulp": "^4.0.0",
@@ -47,9 +41,12 @@
     "gulp-clone": "^2.0.1",
     "gulp-concat": "^2.6.1",
     "gulp-concat-css": "^3.1.0",
+    "gulp-concat-filenames": "^1.2.0",
     "gulp-copy": "^4.0.0",
+    "gulp-debug": "^4.0.0",
     "gulp-dedupe": "0.0.2",
     "gulp-flatten": "^0.4.0",
+    "gulp-git": "^2.9.0",
     "gulp-header": "^2.0.5",
     "gulp-if": "^2.0.2",
     "gulp-json-editor": "^2.4.3",
@@ -60,9 +57,13 @@
     "gulp-rename": "^1.4.0",
     "gulp-replace": "^1.0.0",
     "gulp-rtlcss": "^1.3.0",
+    "gulp-tap": "^1.0.1",
     "gulp-uglify": "^3.0.1",
     "inquirer": "^8.2.0",
+    "jquery": "^3.4.0",
+    "less": "^3.7.1 || ^4.0.0",
     "map-stream": "^0.1.0",
+    "merge-stream": "^2.0.0",
     "mkdirp": "^0.5.1",
     "normalize-path": "^3.0.0",
     "replace-ext": "^1.0.0",