chore: upgrade devDependencies

package.json

@@ -54,23 +54,24 @@
     "weathericons": "^2.1.0"
   },
   "devDependencies": {
-    "autoprefixer": "^9.4.7",
-    "browser-sync": "^2.26.3",
-    "cssnano": "^4.1.8",
-    "gulp": "^4.0.0",
+    "autoprefixer": "^10.4.13",
+    "browser-sync": "^2.27.10",
+    "cssnano": "^5.1.14",
+    "gulp": "^4.0.2",
     "gulp-color": "^0.0.2",
     "gulp-concat": "^2.6.1",
     "gulp-imagemin": "^3.4.0",
     "gulp-notify": "^3.2.0",
     "gulp-nunjucks": "^4.0.0",
     "gulp-plumber": "^1.2.1",
-    "gulp-postcss": "^8.0.0",
+    "gulp-postcss": "^9.0.1",
     "gulp-rename": "^1.4.0",
     "gulp-sass": "^5.1.0",
     "gulp-uglify": "^3.0.1",
     "gulp-uglify-es": "^1.0.4",
     "imagemin-mozjpeg": "^8.0.0",
-    "nunjucks": "^3.1.7",
-    "sass": "^1.52.3"
+    "nunjucks": "^3.2.3",
+    "postcss": "^8.4.19",
+    "sass": "^1.56.2"
   }
 }