Add SprintIssues Stream [MFLP-15] #54
Description
Currently, this tap has a SprintStream and an IssueStream, but no SprintIssueStream to show the issues that are in each sprint. This is done in the Airbyte variant here by using the sprint/{sprint_id}/issue api endpoint. This would be similar to how the SprintStream is fetched by board_id.
It is certainly possible to add the sprint and closedSprint fields on to the IssueStream and derive the table from those values, but it would be inefficient from a storage standpoint.