Update dependency django-haystack to v3.0

This MR contains the following updates:

Package	Type	Update	Change
django-haystack	dependencies	patch	3.0b1 -> 3.0

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added 3 commits

• 5bba476f...c449808e - 2 commits from branch master
• 90a5f095 - Update dependency django-haystack to v3.0

Compare with previous version

merged

mentioned in commit 6560c434