improve interps

[nstarman]

Signed-off-by: Nathaniel Starkman (@nstarman) nstarkman@protonmail.com

Description

Improve interpolated coordinates

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• Document changes in the CHANGES.rst file. See existing changelog for examples.
• Add tests, if applicable, to ensure code coverage never decreases.
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[codecov]

Codecov Report

Merging #31 (a1d6317) into master (d733cc1) will increase coverage by 26.73%.
The diff coverage is 97.54%.

@@             Coverage Diff             @@
##           master      #31       +/-   ##
===========================================
+ Coverage   54.23%   80.96%   +26.73%     
===========================================
  Files          21       21               
  Lines        1016     1114       +98     
===========================================
+ Hits          551      902      +351     
+ Misses        465      212      -253     

Impacted Files	Coverage Δ
trackstream/utils/path.py	37.70% <25.00%> (ø)
trackstream/utils/interpolated_coordinates.py	98.19% <99.27%> (+68.40%)	⬆️
trackstream/utils/generic_coordinates.py	95.23% <100.00%> (+70.64%)	⬆️
trackstream/utils/interpolate.py	94.23% <0.00%> (+0.96%)	⬆️
trackstream/utils/_framelike.py	100.00% <0.00%> (+61.11%)	⬆️

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