Bump django-haystack from 2.8.1 to 3.0

[dependabot-preview]

Bumps django-haystack from 2.8.1 to 3.0.

Release notes

Sourced from django-haystack's releases.

3.0: Django 3, dropping Python 2 support

• Support for Django 3
• Dropping support for Python 2

Changelog

Sourced from django-haystack's changelog.

Changelog

%%version%% (unreleased)

• Docs: don't tell people how to install Python packages. [Chris Adams]

  It's 2018, "pip install <packagename>" is the only thing we should volunteer.

• Update Elasticsearch documentation. [Chris Adams]

  • Add 5.x to supported versions
  • Replace configuration and installation information with pointers to the official docs
  • Stop mentioning pyes since it’s fallen behind the official client in awareness

  * Don’t tell people how to install Python packages

• Fix get_coords() calls. [Chris Adams]

• Update README & contributor guide. [Chris Adams]

• Blacken. [Chris Adams]

• Isort everything. [Chris Adams]

• Update code style settings. [Chris Adams]

  Prep for Blackening

• Remove PyPy / Django 2 targets. [Chris Adams]

  We'll restore these when pypy3 is more mainstream

• Use default JRE rather than requiring Oracle. [Chris Adams]

  OpenJDK is also supported and that does not require accepting a license.

• Changed ES5.x test skip message to match the friendlier 2.x one. [Bruno Marques]

• Fixed faceted search and autocomplete test. [Bruno Marques]

• Removed ES5 code that actually never runs. [Bruno Marques]

• Fixed kwargs in ES5's build_search_query. [Bruno Marques]

• ES5: fixed MLT, within and dwithin. [Bruno Marques]

• Assorted ES5.x fixes. [Bruno Marques]

• Re-added sorting, highlighting and suggesting to ES5.x backend. [Bruno Marques]

• Fixed filters and fuzziness on ES5.x backend. [Bruno Marques]

• Added Java 8 to Travis dependencies. [Bruno Marques]

• Started Elasticsearch 5.x support. [Bruno Marques]

• Style change to avoid ternary logic on the end of a line. [Chris Adams]

  This is unchanged from #1475 but avoids logic at the end of the line

• Do not raise when model cannot be searched. [benvand]

  • Return empty string.

  * Test.

• Merge pull request #1616 from hornn/batch_order. [Chris Adams]

  Order queryset by pk in update batching

Commits

• 1cc8288 Create codeql-analysis.yml
• 08dd947 Merge pull request #1739 from vladlytvynenko/patch-1
• 90da846 Fixed incorrect example of SearchQuerySet in multiple_index.rst
• eee0db1 Merge pull request #1737 from homerjonathan/patch-1
• 753390f Whoosh official source has moved
• 6052eb8 Merge pull request #1734 from phlb/feature/fix-missing-exposed-facedatefield
• 6d97b61 expose FaceDateField in haystack.indexes
• 662ef9f Merge pull request #1733 from phlb/feature/fix-backend-in-update-worker
• 3a2c466 update_index: Fix the backend in update_worker
• ea3f8c9 Merge pull request #1727 from amites/patch-1
• Additional commits viewable in compare view

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