Upgrade docusaurus from beta.18 → beta.21 (#112)

Author: gksander

website/package.json

@@ -15,17 +15,17 @@
     "write-heading-ids": "docusaurus write-heading-ids"
   },
   "dependencies": {
-    "@docusaurus/core": "2.0.0-beta.18",
-    "@docusaurus/preset-classic": "2.0.0-beta.18",
-    "@docusaurus/remark-plugin-npm2yarn": "^2.0.0-beta.18",
+    "@docusaurus/core": "2.0.0-beta.21",
+    "@docusaurus/preset-classic": "2.0.0-beta.21",
+    "@docusaurus/remark-plugin-npm2yarn": "^2.0.0-beta.21",
     "@mdx-js/react": "^1.6.22",
     "clsx": "^1.1.1",
     "prism-react-renderer": "^1.3.1",
     "react": "^17.0.2",
     "react-dom": "^17.0.2"
   },
   "devDependencies": {
-    "@docusaurus/module-type-aliases": "^2.0.0-beta.18",
+    "@docusaurus/module-type-aliases": "^2.0.0-beta.21",
     "@tsconfig/docusaurus": "^1.0.5",
     "formideploy": "^0.4.1",
     "typescript": "^4.6.3"