Use mypy-friendly dict type.

[delucchi-cmu]

Change Description

Downstream projects that use mypy are sad about the new type hint on method.

See: https://github.com/astronomy-commons/lsdb/actions/runs/9486506921/job/26140991827?pr=354

Code Quality

• [x] I have read the Contribution Guide
• [x] My code follows the code style of this project
• [x] My code builds (or compiles) cleanly without any errors or warnings
• [x] My code contains relevant comments and necessary documentation

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 93.80%. Comparing base (20eee15) to head (ba2b4bc).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #292 +/- ## ======================================= Coverage 93.80% 93.80% ======================================= Files 57 57 Lines 2002 2002 ======================================= Hits 1878 1878 Misses 124 124 ```

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[github-actions[bot]]

Before [20eee15e]	After [d7e87d21]	Ratio	Benchmark (Parameter)
991±2μs	1.00±0.02ms	1.01	benchmarks.time_test_cone_filter_multiple_order
79.7±0.5ms	78.8±0.7ms	0.99	benchmarks.MetadataSuite.time_load_partition_join_info
366±1ms	363±2ms	0.99	benchmarks.Suite.time_outer_pixel_alignment
43.6±0.7ms	43.2±0.6ms	0.99	benchmarks.Suite.time_pixel_tree_creation
22.6±0.3ms	22.1±0.5ms	0.98	benchmarks.MetadataSuite.time_load_partition_info_order6
80.3±0.8ms	78.5±0.8ms	0.98	benchmarks.MetadataSuite.time_load_partition_info_order7
13.9±0.2ms	13.6±0.2ms	0.98	benchmarks.Suite.time_inner_pixel_alignment
86.0±2ms	84.1±2ms	0.98	benchmarks.Suite.time_paths_creation
126±0.3ms	123±1ms	0.97	benchmarks.time_test_alignment_even_sky

Click here to view all benchmarks.