Update merged timeline

[NRauschmayr]

Description of changes:

I added the PyTorch dataloader events to the merged time line.

Style and formatting:

I have run pre-commit install to ensure that auto-formatting happens with every commit.

Issue number, if available

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov-io]

Codecov Report

Merging #480 (59b151a) into master (a7c697f) will decrease coverage by 0.67%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #480      +/-   ##
==========================================
- Coverage   66.88%   66.20%   -0.68%     
==========================================
  Files         173      163      -10     
  Lines       13280    12934     -346     
==========================================
- Hits         8882     8563     -319     
+ Misses       4398     4371      -27     

Impacted Files	Coverage Δ
smdebug/profiler/analysis/utils/merge_timelines.py	97.51% <ø> (ø)
smdebug/core/modes.py	55.00% <0.00%> (-20.00%)	⬇️
smdebug/xgboost/singleton_utils.py	0.00% <0.00%> (-20.00%)	⬇️
smdebug/trials/profiler_trial.py	24.61% <0.00%> (-18.47%)	⬇️
smdebug/mxnet/collection.py	73.33% <0.00%> (-16.67%)	⬇️
smdebug/exceptions.py	65.47% <0.00%> (-15.48%)	⬇️
smdebug/core/reduction_config.py	88.31% <0.00%> (-7.80%)	⬇️
smdebug/core/reader.py	85.18% <0.00%> (-7.41%)	⬇️
smdebug/tensorflow/callable_cache.py	82.60% <0.00%> (-6.53%)	⬇️
smdebug/core/singleton_utils.py	85.29% <0.00%> (-5.89%)	⬇️
... and 20 more

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.61%. Comparing base (f841a8b) to head (682a85e).
⚠️ Report is 90 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #480      +/-   ##
==========================================
- Coverage   76.14%   74.61%   -1.53%     
==========================================
  Files         126      116      -10     
  Lines       10872    10526     -346     
==========================================
- Hits         8278     7854     -424     
- Misses       2594     2672      +78     

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