fix: declare missing dependencies (#6097)

* fix(utils-validation): add missing peer dependencies `react` and `react-dom`

* fix(theme-classic): add missing peer dependency `@docusaurus/core`

* ci: disable PnP fallbacks

* ci: link to the docs

* Update package.json

Co-authored-by: Joshua Chen <sidachen2003@gmail.com>

.github/workflows/tests-e2e.yml

@@ -78,6 +78,10 @@ jobs:
           yarn config set unsafeHttpWhitelist --json '["localhost"]'
           yarn config set enableGlobalCache true
 
+          # Make PnP as strict as possible
+          # https://yarnpkg.com/features/pnp#fallback-mode
+          yarn config set pnpFallbackMode none
+
           # Patch package so that peer deps are provided. This has been fixed in terser by making acorn a direct dependency
           # TODO watch out for the next terser release. Commit: https://github.com/terser/terser/commit/05b23eeb682d732484ad51b19bf528258fd5dc2a
           yarn config set packageExtensions --json '{"terser-webpack-plugin@*": {"dependencies": {"acorn": "^8.6.0"}}, "html-minifier-terser@*": {"dependencies": {"acorn": "^8.6.0"}}}'

packages/docusaurus-theme-classic/package.json

@@ -23,6 +23,7 @@
     "update-code-translations": "node -e 'require(\"./update-code-translations.js\").run()'"
   },
   "dependencies": {
+    "@docusaurus/core": "2.0.0-beta.13",
     "@docusaurus/plugin-content-blog": "2.0.0-beta.13",
     "@docusaurus/plugin-content-docs": "2.0.0-beta.13",
     "@docusaurus/plugin-content-pages": "2.0.0-beta.13",
@@ -45,7 +46,6 @@
     "rtlcss": "^3.3.0"
   },
   "devDependencies": {
-    "@docusaurus/core": "2.0.0-beta.13",
     "@docusaurus/module-type-aliases": "2.0.0-beta.13",
     "@docusaurus/types": "2.0.0-beta.13",
     "@types/mdx-js__react": "^1.5.4",

packages/docusaurus-utils-validation/package.json

@@ -23,6 +23,10 @@
     "joi": "^17.4.2",
     "tslib": "^2.3.1"
   },
+  "peerDependencies": {
+    "react": "*",
+    "react-dom": "*"
+  },
   "engines": {
     "node": ">=14"
   }