message: update iotex-react-block-producers iotex-react-language-dropdown iotex-react-footer
diff: "graphql-tools": "4.0.5",
  "https": "1.0.0",
  "iotex-antenna": "0.19.0",
  - "iotex-react-block-producers": "2.1.1",
  - "iotex-react-footer": "2.2.2",
  - "iotex-react-language-dropdown": "2.2.0",
  + "iotex-react-block-producers": "2.4.0",
  + "iotex-react-language-dropdown": "2.4.0",
  + "iotex-react-footer": "2.4.0",
  "is-browser": "2.1.0",
  "is-electron": "2.2.0",
  "isomorphic-unfetch": "3.0.0",
  