Example has misleading types in responseData. (typo in documentation)

[mbejda]

Typo in documentation

Documentation implies the responseData type action is string which is incorrect. It should be
type Action.

Error thrown by the IDE because of incorrect type.
https://github.com/hellobloom/share-kit/blame/master/README.md#L94

The example should include the correct type like so:

 
      const requestData: RequestData = {
      action: <Action>'request_attestation_data',
      token: "0x8f31e48a585fd12ba58e70e03292cac712cbae39bc7eb980ec189aa88e24d04",
      url: "https://bloom.co/api/receiveData",
      org_logo_url: 'https://bloom.co/images/notif/bloom-logo.png',
      org_name: 'Bloom',
      org_usage_policy_url: 'https://bloom.co/legal/terms',
      org_privacy_policy_url: 'https://bloom.co/legal/privacy',
      types: ['full-name', 'phone', 'email'],
    }

[JaceHensley]

fix in #20