Use skip_preflight_check to allow upgrading react-scripts

package.json

@@ -102,6 +102,7 @@
     "electron-mock-ipc": "^0.3.8",
     "eslint-config-airbnb-typescript": "^7.0.0",
     "eslint-config-prettier": "^6.10.0",
+    "eslint-config-react-app": "^6.0.0",
     "eslint-plugin-monorepo": "^0.2.1",
     "eslint-plugin-prettier": "^3.0.1",
     "eslint-plugin-react-hooks": "^4.0.0",
@@ -133,7 +134,7 @@
     "react-docgen-typescript-loader": "^3.7.2",
     "react-dom": "^16.8.0",
     "react-is": "^16.13.1",
-    "react-scripts": "^3.3.0",
+    "react-scripts": "^4.0.3",
     "requestidlecallback-polyfill": "^1.0.2",
     "rimraf": "^3.0.2",
     "rxjs": "^6.0.0",

products/jbrowse-web/.env

@@ -0,0 +1 @@
+SKIP_PREFLIGHT_CHECK=true

products/jbrowse-web/rescripts/workerLoaderRescript.js

@@ -49,7 +49,6 @@ module.exports = config => {
             ],
           ),
           plugins: [
-            ...loaderListRule.oneOf[1].options.plugins,
             [
               require.resolve('babel-plugin-named-asset-import', {
                 paths: ['../../node_modules/react-scripts/node_modules'],