Update dependency postcss to v8.4.18

package.json

@@ -15,7 +15,7 @@
     "@types/react": "18.0.9",
     "@types/react-dom": "18.0.5",
     "autoprefixer": "^10.4.7",
-    "postcss": "^8.4.14",
+    "postcss": "8.4.18",
     "tailwindcss": "^3.1.2",
     "typescript": "4.7.2"
   }

yarn.lock

@@ -531,6 +531,15 @@ postcss@8.4.14:
     picocolors "^1.0.0"
     source-map-js "^1.0.2"
 
+postcss@8.4.18:
+  version "8.4.18"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.18.tgz#6d50046ea7d3d66a85e0e782074e7203bc7fbca2"
+  integrity sha512-Wi8mWhncLJm11GATDaQKobXSNEYGUHeQLiQqDFG1qQ5UTDPTEvKw0Xt5NsTpktGTwLps3ByrWsBrG0rB8YQ9oA==
+  dependencies:
+    nanoid "^3.3.4"
+    picocolors "^1.0.0"
+    source-map-js "^1.0.2"
+
 postcss@^8.4.14:
   version "8.4.16"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.16.tgz#33a1d675fac39941f5f445db0de4db2b6e01d43c"