fix #296

[luiztauffer]

Fix #296

• use show_behavioral_events function for BehavioralTimeSeries
• fix plotly version on requirements (ref: https://github.com/plotly/plotly.py/issues/3686)

[codecov[bot]]

Codecov Report

Merging #297 (31915cd) into master (b99aa49) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #297   +/-   ##
=======================================
  Coverage   66.28%   66.29%           
=======================================
  Files          35       35           
  Lines        3470     3471    +1     
=======================================
+ Hits         2300     2301    +1     
  Misses       1170     1170           

Flag	Coverage Δ
unittests	66.29% <100.00%> (+<0.01%)	:arrow_up:

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Impacted Files	Coverage Δ
nwbwidgets/timeseries.py	58.66% <ø> (ø)
nwbwidgets/view.py	96.55% <ø> (ø)
nwbwidgets/behavior.py	74.22% <100.00%> (+0.26%)	:arrow_up:

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[bendichter]

@luiztauffer could you provide a screenshot?