Changelog

• 63bb67f: Support per-branch environment variables (#20) (@BarnabyShearer)
• 807ddec: Fix environment variable bug following #20 (#25) (@dglsparsons)
• ec7a2c1: Adding Content-Type headers to POST and PATCH requests (#23) (@ctgowrie)
• c2382a8: DeleteDeployment: Create a delete deployment method (#22) (@WCMinor)
• efae489: Add test for Deployment delete_on_destroy (@dglsparsons)
• 144e8a7: Upgrade/pin tfplugindocs version (@dglsparsons)
• c5cc2f8: Regenerate all docs (@dglsparsons)
• 318e2bf: Allow updating Deployment delete_on_destroy field (#27) (@dglsparsons)