range object validator support

[SpicyGarlicAlbacoreRoll]

• allows ranges in search param lists
• optimizes range when step=1 to use lower and upper bounds when building search opts

[codecov-commenter]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (d410a29) 89.87% compared to head (efea8b4) 89.79%.

Files	Patch %	Lines
asf_search/ASFSearchOptions/validators.py	66.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #254      +/-   ##
==========================================
- Coverage   89.87%   89.79%   -0.09%     
==========================================
  Files          54       54              
  Lines        2025     2028       +3     
==========================================
+ Hits         1820     1821       +1     
- Misses        205      207       +2     

Flag	Coverage Δ
unittests	89.79% <66.66%> (-0.09%)	⬇️

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