Update package.json

package.json

@@ -30,7 +30,7 @@
     "copy-webpack-plugin": "^9.0.0",
     "cross-env": "^7.0.3",
     "css-loader": "^5.2.6",
-    "css-minimizer-webpack-plugin": "^4.0.0",
+    "css-minimizer-webpack-plugin": "^5.0.1",
     "eslint": "^7.21.0",
     "eslint-config-airbnb-base": "^14.2.1",
     "eslint-plugin-import": "^2.23.4",
@@ -40,7 +40,7 @@
     "postcss": "^8.3.4",
     "postcss-loader": "^6.1.0",
     "sass": "^1.55.0",
-    "postcss-preset-env": "7.8.0",
+    "postcss-preset-env": "^6.7.0",
     "sass-loader": "^12.1.0",
     "shx": "^0.3.3",
     "style-loader": "^2.0.0",