TYPE: Add more type hints

[snowman2]

• Closes add type annotations #373

[codecov]

Codecov Report

Merging #507 (3fcf72b) into master (900066c) will decrease coverage by 0.02%.
The diff coverage is 98.49%.

@@            Coverage Diff             @@
##           master     #507      +/-   ##
==========================================
- Coverage   95.84%   95.82%   -0.03%     
==========================================
  Files          13       13              
  Lines        1566     1581      +15     
==========================================
+ Hits         1501     1515      +14     
- Misses         65       66       +1     

Impacted Files	Coverage Δ
rioxarray/rioxarray.py	96.70% <96.49%> (-0.22%)	⬇️
rioxarray/_io.py	95.62% <100.00%> (+0.02%)	⬆️
rioxarray/_show_versions.py	87.80% <100.00%> (+0.30%)	⬆️
rioxarray/crs.py	72.72% <100.00%> (+1.29%)	⬆️
rioxarray/merge.py	96.25% <100.00%> (ø)
rioxarray/raster_array.py	97.16% <100.00%> (+0.03%)	⬆️
rioxarray/raster_dataset.py	100.00% <100.00%> (ø)

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