downgrade react scripts

Downgrade React Scripts to 3.4.0 due to facebook/create-react-app#9322

Author: zfletch

.github/workflows/deploy.yml

@@ -26,7 +26,7 @@ jobs:
           CI: true
 
       - name: Build
-        run: yarn demo
+        run: yarn build
         env:
           PUBLIC_URL: /treebank-react
 
@@ -35,5 +35,5 @@ jobs:
         with:
           GITHUB_TOKEN: ${{ github.token }}
           BRANCH: gh-pages
-          FOLDER: demo
+          FOLDER: build
           CLEAN: true

.github/workflows/test.yml

@@ -1,4 +1,4 @@
-name: Run tests
+name: test
 
 on: [push, pull_request]
 

package.json

@@ -16,7 +16,7 @@
     "prop-types": "^15.7.2",
     "react": "^16.13.1",
     "react-dom": "^16.13.1",
-    "react-scripts": "3.4.3",
+    "react-scripts": "3.4.0",
     "react-test-renderer": "^16.14.0",
     "xml2js": "^0.4.23"
   },