update version to 0.3.3

[annabel48lin]

Update to #300 with setup.py -- version updated to 0.3.3

Reason:

• tag v0.3.2 was taken and I was unable to create a new release.
• not comfortable deleting tag, so we are incrementing the version

[codecov[bot]]

Codecov Report

Merging #301 (35befa7) into master (7760321) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #301   +/-   ##
=======================================
  Coverage   89.56%   89.56%           
=======================================
  Files          29       29           
  Lines        3047     3047           
=======================================
  Hits         2729     2729           
  Misses        318      318           

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