Fix: "except" field in Star macro handles cross db column casing

[danieldiamond]

This is a:

• bug fix PR with no breaking changes — please ensure the base branch is master
• new functionality — please ensure the base branch is the latest dev/ branch
• a breaking change — please ensure the base branch is the latest dev/ branch

Description & motivation

Checklist

• I have verified that these changes work locally on the following warehouses (Note: it's okay if you do not have access to all warehouses, this helps us understand what has been covered)
  • BigQuery
  • Postgres
  • Redshift
  • Snowflake
• I have "dispatched" any new macro(s) so non-core adapters can also use them (e.g. the star() source)
• I have updated the README.md (if applicable)
• I have added tests & descriptions to my models (and macros if applicable)
• I have added an entry to CHANGELOG.md

[danieldiamond]

@jtcohen6 failing integration tests appear to be unrelated to this PR. Tried pinning dbt_requirements in integration_tests project even though it inherits from root directory but didn't help. I think it's occurring in run_tests.sh but unable to trace.

Anyways hoping this PR can make it through. Let me know if any additional information is required.

Error encountered in /home/********/project/integration_tests/dbt_modules/dbt_utils
Running with dbt=0.21.0-b1
Encountered an error:
Runtime Error
  Failed to read package: Runtime Error
    This version of dbt is not supported with the 'dbt_utils' package.
      Installed version of dbt: =0.21.0-b1
      Required version of dbt for 'dbt_utils': ['>=0.20.0', '<0.21.0']
    Check the requirements for the 'dbt_utils' package, or run dbt again with --no-version-check

[jtcohen6]

@danieldiamond This is related to how we run dbt-utils integration tests with the latest prerelease version of dbt, and we just released v0.21.0-b1 yesterday. As it is, there aren't going to be any breaking changes to dbt-utils in v0.21, so we can bump the require-dbt-version boundary accordingly.

[danieldiamond]

cc'ing @jtcohen6 @annafil unable to add reviewers but would like to see this get merged in if possible

[reidwil-jb]

#403 If one of our PR's gets merged, we should close the other @danieldiamond

[danieldiamond]

niiice @reidwil-jb didnt realize that col.column|lower not in except|lower mapping can apply to both str and list objects 🔥

[reidwil-jb]

@danieldiamond yep! Two solutions to solve the same problem! Would love to have this merged asap as the capitalization has tripped me up multiple times 😄

[jasnonaz]

Hi @danieldiamond - thank you so much for contributing to dbt-utils! Given the duplicate PRs, we are going to close this and merge #403.