chore(react-json-tree): add back react dev dependencies (#606)

Author: Methuselah96

packages/react-json-tree/examples/package.json

@@ -22,5 +22,9 @@
     "react-dom": "^16.13.1",
     "react-json-tree": "^0.12.1"
   },
+  "devDependencies": {
+    "@types/react": "^16.9.46",
+    "@types/react-dom": "^16.9.8"
+  },
   "private": true
 }

packages/react-json-tree/package.json

@@ -50,6 +50,12 @@
     "prop-types": "^15.7.2",
     "react-base16-styling": "^0.7.0"
   },
+  "devDependencies": {
+    "@types/react": "^16.3.18",
+    "@types/react-test-renderer": "^16.9.3",
+    "react": "^16.13.1",
+    "react-test-renderer": "^16.13.1"
+  },
   "peerDependencies": {
     "@types/react": "^16.3.18",
     "react": "^16.3.0"