Use compressed-lists for GRangesList, classes extend BiocObject.

[jkanche]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 62.65823% with 59 lines in your changes missing coverage. Please review.
✅ Project coverage is 64.83%. Comparing base (6cb0473) to head (57a57ed).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/genomicranges/granges.py	48.80%	43 Missing ⚠️
src/genomicranges/grangeslist.py	79.71%	13 Missing and 1 partial ⚠️
src/genomicranges/io/gtf.py	0.00%	1 Missing ⚠️
src/genomicranges/io/ucsc.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #160      +/-   ##
==========================================
+ Coverage   64.61%   64.83%   +0.21%     
==========================================
  Files           8        8              
  Lines        1933     1709     -224     
  Branches      357      310      -47     
==========================================
- Hits         1249     1108     -141     
+ Misses        526      467      -59     
+ Partials      158      134      -24     

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