v0.3.0 dbt_qualtrics_source

PR #12 includes the following update:

Under the Hood

• Explicitly casts all boolean fields as {{ dbt.type_boolean() }}.
• (Affects Redshift only) Creates new qualtrics_union_data macro to accommodate Redshift's treatment of empty tables.
  • For each staging model, if the source table is not found in any of your schemas, the package will create a empty table with 0 rows for non-Redshift warehouses and a table with 1 all-null row for Redshift destinations.
  • This is necessary as Redshift will ignore explicit data casts when a table is completely empty and materialize every column as a varchar. This throws errors in downstream transformations in the zendesk package. The 1 row will ensure that Redshift will respect the package's datatype casts.

Full Changelog: v0.2.2...v0.3.0