fix: shuup/admin/package.json & shuup/admin/package-lock.json to redu…

…ce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-POSTCSS-1090595

shuup/admin/package.json

@@ -28,7 +28,7 @@
     "@babel/core": "7.12.7",
     "@babel/preset-env": "7.12.7",
     "@babel/polyfill": "^7.0.0",
-    "autoprefixer": "^9.6.1",
+    "autoprefixer": "^10.0.0",
     "babel-core": "^6.26.3",
     "babel-plugin-wildcard": "^5.0.0",
     "babel-preset-env": "^1.7.0",
@@ -54,7 +54,7 @@
     "npm-font-open-sans": "^1.1.0",
     "outlayer": "^2.1.1",
     "parcel-bundler": "^1.12.4",
-    "postcss-modules": "^1.1.0",
+    "postcss-modules": "^4.0.0",
     "redux": "^3.0.4",
     "redux-actions": "^0.9.0",
     "redux-persist": "^4.10.2",