move flow to dev dependencies

package.json

@@ -16,6 +16,7 @@
     "@testing-library/react": "^9.4.0",
     "chai": "^4.2.0",
     "chai-http": "^4.3.0",
+    "flow-bin": "^0.114.0",
     "lerna": "^3.20.2",
     "mocha": "^7.0.0",
     "react-test-renderer": "^16.12.0"

packages/play-node-go/package.json

@@ -5,7 +5,6 @@
   "dependencies": {
     "@mars/heroku-js-runtime-env": "^3.0.2",
     "@testing-library/user-event": "^7.1.2",
-    "flow-bin": "^0.114.0",
     "node-sass": "^4.13.0",
     "react": "^16.12.0",
     "react-dom": "^16.12.0",