Sampler updates

[andreicuceu]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 14.73684% with 81 lines in your changes missing coverage. Please review.
✅ Project coverage is 37.14%. Comparing base (0bd3361) to head (5d33c33).
⚠️ Report is 17 commits behind head on master.

Files with missing lines	Patch %	Lines
vega/data.py	14.81%	20 Missing and 3 partials ⚠️
vega/vega_interface.py	29.62%	15 Missing and 4 partials ⚠️
vega/coordinates.py	5.88%	16 Missing ⚠️
vega/samplers/sampler_interface.py	0.00%	15 Missing ⚠️
vega/build_config.py	0.00%	4 Missing ⚠️
vega/samplers/polychord.py	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #153      +/-   ##
==========================================
- Coverage   37.53%   37.14%   -0.39%     
==========================================
  Files          30       30              
  Lines        4116     4178      +62     
  Branches      771      787      +16     
==========================================
+ Hits         1545     1552       +7     
- Misses       2416     2468      +52     
- Partials      155      158       +3     

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