use octokit to create a release tag
soft_deletion and uniq indexes don't mix
validate that we don't create duplicate webhooks.
update schema
Merge pull request #205 from zendesk/jstillwell/fix/soft_delete_webhooks

Remove unique index on webhooks
add tests for webhook soft_deletion
better validation method that doesn't require unique deleted_at dates
remove unnecessary timecop.
remove all references to timecop
Merge pull request #206 from zendesk/jstillwell/add_tests_for_PR205

add tests for webhook soft_deletion
Merge pull request #194 from pitr/use-octokit-to-create-release

use octokit gem to create a tag/release
bundle update
Merge pull request #209 from zendesk/sdavidovitz/bundle_update

bundle update