update react-scripts version

Author: okwolf

example/package.json

@@ -10,10 +10,16 @@
   "dependencies": {
     "hyperapp-scripts": "file:../"
   },
-  "browserslist": [
-    ">0.2%",
-    "not dead",
-    "not ie <= 11",
-    "not op_mini all"
-  ]
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version",
+      "last 1 safari version"
+    ]
+  }
 }

package.json

@@ -13,7 +13,7 @@
     "release": "./pre-flight-tests && npm run format:check && git tag $npm_package_version && git push && git push --tags && npm publish"
   },
   "dependencies": {
-    "react-scripts": "=2.1.8"
+    "react-scripts": "=3.0.0"
   },
   "devDependencies": {
     "hyperapp": "=1.2.9"