React 17 support

[hoxu]

react-flip-move has conflicting peerDependencies with React 17:

Found: [email protected]
node_modules/react
  react@"17.0.1" from the root project
  peer react@">=16.3.x" from [email protected]
  node_modules/react-flip-move
    dev react-flip-move@"^3.0.4" from the root project

      {
        "type": "peer",
        "name": "react",
        "spec": ">=16.3.x",
        "from": {
          "name": "react-flip-move",
          "version": "3.0.4",
          "location": "node_modules/react-flip-move",
          "dependents": [
            {
              "type": "dev",
              "name": "react-flip-move",
              "spec": "^3.0.4",
              "from": {
                "location": "REDACTED"
              }
            }
          ]
        }
      },