Bump yarn berry, bump deps

.yarnrc.yml

@@ -1,18 +1,15 @@
+compressionLevel: mixed
+
+enableGlobalCache: false
+
 enableImmutableInstalls: false
 
 enableProgressBars: false
 
 logFilters:
-  # Discard any "cannot be found in cache" messages
   - code: YN0013
     level: discard
 
 nodeLinker: node-modules
 
-plugins:
-  - path: .yarn/plugins/@yarnpkg/plugin-interactive-tools.cjs
-    spec: "@yarnpkg/plugin-interactive-tools"
-  - path: .yarn/plugins/@yarnpkg/plugin-version.cjs
-    spec: "@yarnpkg/plugin-version"
-
-yarnPath: .yarn/releases/yarn-3.2.0.cjs
+yarnPath: .yarn/releases/yarn-4.0.2.cjs

package.json

@@ -13,6 +13,7 @@
     "build:release": "polkadot-ci-ghact-build --skip-beta && polkadot-ci-ghact-docs",
     "docs": "docusaurus build",
     "lint": "echo \"Skipping lint\"",
+    "postinstall": "polkadot-dev-yarn-only",
     "swizzle": "docusaurus swizzle",
     "deploy": "docusaurus deploy",
     "serve": "docusaurus serve --port 8080",
@@ -22,7 +23,7 @@
     "@docusaurus/core": "2.4.3",
     "@docusaurus/preset-classic": "2.4.3",
     "@mdx-js/react": "^1.6.22",
-    "@polkadot/dev": "^0.77.1",
+    "@polkadot/dev": "^0.78.1",
     "@polkadot/typegen": "^10.11.1",
     "clsx": "^1.2.1",
     "react": "^18.2.0",