Update rstar requirement from 0.11 to 0.12

[dependabot[bot]]

Updates the requirements on rstar to permit the latest version.

Release notes

Sourced from rstar's releases.

v0.12.0 release

What's Changed

• Fix a stack overflow error in DrainIterator by @​nickguletskii in georust/rstar#127
• Remove actually unused depth parameter and make Clippy happy. by @​adamreichold in georust/rstar#130
• Update rstar-benches geo dependency by @​michaelkirk in georust/rstar#131
• add mint feature for Point trait impl for mint::Point2 and mint::Point3 by @​ripytide in georust/rstar#134
• Better distance_2 docs by @​urschrei in georust/rstar#136
• Add cached envelope benchmark by @​urschrei in georust/rstar#137
• update to heapless=0.8 by @​rursprung in georust/rstar#140
• Update CI as a precursor to enabling merge queues by @​urschrei in georust/rstar#143
• Minor doc updates by @​urschrei in georust/rstar#144
• Implement an owning iterator and IntoIter for RTree by @​adamreichold in georust/rstar#146
• Hash and Default impls, and some type coverage tests by @​pthariensflame in georust/rstar#150
• Losslessly shrink rtree-example.png by @​pthariensflame in georust/rstar#152
• Update the scaling discussion for bulk_load by @​jerabaul29 in georust/rstar#156
• Use SmallHeap also for the iterator-based nearest neighbour search and optimize its spill implementation. by @​adamreichold in georust/rstar#154

New Contributors

• @​nickguletskii made their first contribution in georust/rstar#127
• @​ripytide made their first contribution in georust/rstar#134
• @​rursprung made their first contribution in georust/rstar#140
• @​pthariensflame made their first contribution in georust/rstar#150
• @​jerabaul29 made their first contribution in georust/rstar#156

Full Changelog: https://github.com/georust/rstar/compare/v0.11.0...v0.12.0

Commits

• 3b32701 Prepare for 0.12.0 release (#157)
• 1812101 Use SmallHeap also for the iterator-based nearest neighbour search and optimi...
• f9973cf Update the scaling discussion for bulk_load (#156)
• c7d53c8 Optimize image rtree-example.png (#152)
• f1407dd Hash and Default impls, and some type coverage tests (#150)
• 6c23af0 Implement an owning iterator and IntoIter for RTree (#146)
• a8904d2 More doc updates (#144)
• 54e7eb0 Update CI as a precursor to enabling merge queues (#143)
• c16c1e9 update to heapless=0.8
• 9f8c6b6 Add cached envelope benchmark (#137)
• Additional commits viewable in compare view

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