Add disabling variables for `issue_assignee`, `issue_label`, `label`,…

… and `requested_reviewer_history` (#45)

* Stage changes

* docs

* something is funky in bk

* test this dbt version out

* test this dbt version out

* specify dbt core version

* update buildkite

* revert req.txt

* Avinash feedback

feature/freshness-updates (#44)

* feature/freshness-updates

* pr ref fix

Merge pull request #39 from fivetran/release/v0.8.0

Release/v0.8.0

Merge pull request #37 from raphaelvarieras/capitalize-fivetran

Capitalize Fivetran

Merge pull request #32 from fivetran/bug/add-disable-teams

bug/add-disable-teams

Merge pull request #26 from fivetran/MagicBot/dbt-utils-cross-db-migr…

…ation

Updates for dbt-utils to dbt-core cross-db macro migration

Merge pull request #22 from fivetran/feature/labels-addition

Feature/Label-Source-Addition

Merge pull request #19 from fivetran/bugfix/timestamp-casts

Bugfix/timestamp casts

Merge pull request #18 from fivetran/MagicBot_9f6ec62333

[MagicBot] Bumping package version

Merge pull request #16 from fivetran/feature/dbt-compatibility

dbt 20 compatibility updates