Url camelcase fix

[theshakeabhi]

Fixes

Fixes #254 by @dhruvkb

Description

This PR would make the prop name uniform across the code base by changing the non-camelcase to camel case.
For now these changes has been made across the code base:
ccLicenseURL to ccLicenseUrl
licenseURL to licenseUrl
openverseLicenseURL to openverseLicenseUrl

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[obulat]

Thank you for your PR!
There are several changes I've added inline: it's better to finish renaming ccLicenseUrl to openverseLicenseUrl, and rename prop names, as well as values.

[zackkrida]

Thank you @theshakeabhi !