Add UnROOT to INTEGRATIONS.md replacing UpROOT

[Moelf]

uproot is not recommended anymore with UnROOT is much more mature now

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (6bafed9) 93.68% compared to head (44f33de) 94.39%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #351      +/-   ##
==========================================
+ Coverage   93.68%   94.39%   +0.70%     
==========================================
  Files           7        7              
  Lines         602      624      +22     
==========================================
+ Hits          564      589      +25     
+ Misses         38       35       -3     

see 5 files with indirect coverage changes

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[bkamins]

I cannot see this recommendation in the readme.md of either of these packages.

[Moelf]

the uproot repo has:

There also exists a pure-Julia ROOT file reading library UnROOT.jl that is built for speed and memory efficiency.

[bkamins]

I saw this, but it does not mean that this is preferred. In other words: are you sure that UpRoot.jl maintainers are OK with removing a reference to their package here that we already have?

[Moelf]

yes, basically we (JuliaHEP) don't think people should be using Uproot via Python unless for missing issues such as writing out .root files, but the Table interface is most useful for reading, and I don't want it to be confusing for new users