ci(deps): Update dependency dj-database-url to v0.5.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
dj-database-url	==0.4.2 -> ==0.5.0

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Release Notes

kennethreitz/dj-database-url

### [`v0.5.0`](https://togithub.com/kennethreitz/dj-database-url/blob/master/CHANGELOG.md#v050-2018-03-01) [Compare Source](https://togithub.com/kennethreitz/dj-database-url/compare/v0.4.2...v0.5.0) - Use str port for mssql - Added license - Add mssql to readme - Add mssql support using pyodbc - Fix RST schemas - Django expects Oracle Ports as strings - Fix IPv6 address parsing - Add testing for Python 3.6 - Revert "Add setup.cfg for wheel support" - added option of postgis backend to also add path parsing. (test added also) - Support schema definition for redshift - add redshift support - Add testing for Python 3.5 - Drop testing for Python 2.6 - Fixes issue with unix file paths being turned to lower case - add Redis support - Added SpatiaLite in README.rst

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