Bump to version 2.1.0

[fcollonval]

No description provided.

[codecov-io]

Codecov Report

Merging #40 (d8d6675) into master (caba62f) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master      #40   +/-   ##
=======================================
  Coverage   60.75%   60.75%           
=======================================
  Files          31       31           
  Lines        1613     1613           
  Branches       90       90           
=======================================
  Hits          980      980           
  Misses        628      628           
  Partials        5        5           

Impacted Files	Coverage Δ
jupyterlab_pullrequests/_version.py	100.00% <100.00%> (ø)

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