Handle data slicing for uncertain data

[eldond]

• Uncertain data look like np arrays of objects
• So if the type code is "O", initialize np.full with object() fill.
• Close #136

[codecov[bot]]

Codecov Report

Merging #137 into master will increase coverage by 0.01%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #137      +/-   ##
==========================================
+ Coverage   79.55%   79.56%   +0.01%     
==========================================
  Files          50       50              
  Lines        9762     9769       +7     
==========================================
+ Hits         7766     7773       +7     
  Misses       1996     1996              

Impacted Files	Coverage Δ
omas/omas_core.py	85.39% <100.00%> (+0.02%)	:arrow_up:
omas/tests/test_omas_core.py	96.79% <100.00%> (+0.04%)	:arrow_up:

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[orso82]

@eldond thank you

[eldond]

@orso82 we didn't update the version number on this one. What's the best way for OMFIT scripts to test for this OMAS version in order to decide whether tests are enabled or not? Not having this change causes one of my tests to fail and it should just be skipped if an outdated OMAS version is in use.

[eldond]

I figured it out for this one thing: https://github.com/gafusion/OMFIT-source/blob/grade_eq/regression/test_omas_utils.py#L35-L43

[orso82]

@eldond see 44319c1