chore: upgrade flow-typed

package.json

@@ -87,7 +87,7 @@
     "emoji-regex": "^6.5.1",
     "exports-loader": "^0.6.4",
     "file-loader": "^1.1.6",
-    "flow-typed": "^2.4.0",
+    "flow-typed": "^2.6.2",
     "fs-extra": "^4.0.2",
     "google-auth-library": "^5.5.1",
     "html-webpack-plugin": "3.2.0",
@@ -140,7 +140,6 @@
     "react-waypoint": "^7.3.1",
     "redis": "^2.6.2",
     "rich-markdown-editor": "^9.8.8",
-    "safestart": "1.1.0",
     "sequelize": "^5.21.1",
     "sequelize-cli": "^5.5.0",
     "sequelize-encrypted": "^0.1.0",