Add postcss as a direct dependency

Prior to this change, yarn complained about missing peer dependencies. This was caused by postcss being included as a transcendent dependency, without being explicitly included.

Author: johanib

theme/package.json

@@ -49,6 +49,7 @@
     "cssnano": "^7.1.1",
     "eslint": "^10.0.3",
     "globals": "^17.4.0",
+    "postcss": "^8.4.32",
     "postcss-cli": "^11.0.1",
     "postcss-sass": "^0.5",
     "postcss-scss": "^4.0",

theme/yarn.lock

@@ -3641,7 +3641,7 @@ postcss-value-parser@^4.2.0:
   resolved "https://registry.yarnpkg.com/postcss-value-parser/-/postcss-value-parser-4.2.0.tgz#723c09920836ba6d3e5af019f92bc0971c02e514"
   integrity sha512-1NNCs6uurfkVbeXG4S8JFT9t19m45ICnif8zWLd5oPSZ50QnwMfK+H3jv408d4jw/7Bttv5axS5IiHoLaVNHeQ==
 
-postcss@^8.2.14, postcss@^8.5.6:
+postcss@^8.2.14, postcss@^8.4.32, postcss@^8.5.6:
   version "8.5.8"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.5.8.tgz#6230ecc8fb02e7a0f6982e53990937857e13f399"
   integrity sha512-OW/rX8O/jXnm82Ey1k44pObPtdblfiuWnrd8X7GJ7emImCOstunGbXUpp7HdBrFQX6rJzn3sPT397Wp5aCwCHg==
@@ -4040,9 +4040,9 @@ socket.io-adapter@~2.5.2:
     ws "~8.18.3"
 
 socket.io-parser@~4.2.4:
-  version "4.2.5"
-  resolved "https://registry.yarnpkg.com/socket.io-parser/-/socket.io-parser-4.2.5.tgz#3f41b8d369129a93268f2abecba94b5292850099"
-  integrity sha512-bPMmpy/5WWKHea5Y/jYAP6k74A+hvmRCQaJuJB6I/ML5JZq/KfNieUVo/3Mh7SAqn7TyFdIo6wqYHInG1MU1bQ==
+  version "4.2.6"
+  resolved "https://registry.yarnpkg.com/socket.io-parser/-/socket.io-parser-4.2.6.tgz#19156bf179af3931abd05260cfb1491822578a6f"
+  integrity sha512-asJqbVBDsBCJx0pTqw3WfesSY0iRX+2xzWEWzrpcH7L6fLzrhyF8WPI8UaeM4YCuDfpwA/cgsdugMsmtz8EJeg==
   dependencies:
     "@socket.io/component-emitter" "~3.1.0"
     debug "~4.4.1"