Add support for Point and MultiPoint geometries in shape_bbox_indexer

[huard]

Pull Request Checklist:

• [x] This PR addresses an already opened issue (for bug fixes / features)

  • This PR fixes issue #283

• [x] Tests for the changes have been added (for bug fixes / features)

• [ ] Documentation has been added / updated (for bug fixes / features)

• [x] HISTORY.rst has been updated (with summary of main changes)

• [x] I have added my relevant user information to AUTHORS.md

• What kind of change does this PR introduce?: Feature

• Does this PR introduce a breaking change?: No

• Other information:

[coveralls]

Pull Request Test Coverage Report for Build 5324401827

• 0 of 25 (0.0%) changed or added relevant lines in 1 file are covered.
• 3 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.9%) to 78.224%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
clisops/core/subset.py	0	25	0.0%
<!--	Total:	0	25	0.0%	-->

Files with Coverage Reduction	New Missed Lines	%
clisops/core/subset.py	3	75.56%
<!--	Total:	3		-->

Totals
Change from base Build 5315263336:	-0.9%
Covered Lines:	1110
Relevant Lines:	1419

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💛 - Coveralls

[Zeitsperre]

Memo: I need to add a step to the CI for outputting the versions of pip libraries. This already exists in other workflows. Will add here.