fix: "Invalid type for parameter ContentType" error on js upload

[regisb]

We are affected by this issue:
jazzband/django-pipeline#297 (comment)

In particular, this occurs when trying to upload js assets to s3, such
as with the Scorm xblock:
overhangio/openedx-scorm-xblock#16

This issue is resolved by upgrading django-pipeline to 2.0.3+, as the
fix was introduced here:
jazzband/django-pipeline#715

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[natabene]

@regisb Thank you for your contribution. Looks like this is ready for our review, correct?

[regisb]

Thanks @natabene! Yes, this is ready for review.

[jmbowman]

Sorry for the delay in reviewing; looks fine to me once it's rebased. We'll be going through shortly and dropping the rest of the constraints that were only there for Python 3.5 support, just hadn't gotten to it yet.

[regisb]

rebased!

[edx-status-bot]

Your PR has finished running tests. There were no failures.

[openedx-webhooks]

@regisb 🎉 Your pull request was merged!

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[regisb]

Thanks @jmbowman :)

[edx-pipeline-bot]

EdX Release Notice: This PR has been deployed to the staging environment in preparation for a release to production.

[edx-pipeline-bot]

EdX Release Notice: This PR has been deployed to the production environment.