docusaurus update

Author: tony

docs-v2/package.json

@@ -14,12 +14,12 @@
     "write-heading-ids": "docusaurus write-heading-ids"
   },
   "dependencies": {
-    "@docusaurus/core": "2.0.0-alpha.72",
-    "@docusaurus/preset-classic": "2.0.0-alpha.72",
-    "@mdx-js/react": "^1.6.21",
+    "@docusaurus/core": "2.0.0-beta.0",
+    "@docusaurus/preset-classic": "2.0.0-beta.0",
+    "@mdx-js/react": "^1.6.22",
     "clsx": "^1.1.1",
-    "react": "^17.0.1",
-    "react-dom": "^17.0.1"
+    "react": "^17.0.2",
+    "react-dom": "^17.0.2"
   },
   "browserslist": {
     "production": [