Update to reflect that you can build a section with nothing but fields

HubSpot / slack-client

An asynchronous HTTP client for Slack's web API

Apache License 2.0

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Update to reflect that you can build a section with nothing but fields #187

Closed szabowexler closed 4 years ago

szabowexler commented 4 years ago

Slack's documentation states:

The text for the block, in the form of a text object. Maximum length for the text in this field is 3000 characters. This field is not required if a valid array of fields objects is provided instead.

This PR allows you to either set text, or just provide a list of fields.