Fix Tqdm dependency and API usage.

[marscher]

Fixes #1292

Tested with our notebooks and the bars look like they used to with the previous version.

[codecov]

Codecov Report

Merging #1293 into devel will decrease coverage by 0.02%.
The diff coverage is 11.11%.

@@            Coverage Diff             @@
##            devel    #1293      +/-   ##
==========================================
- Coverage   91.63%   91.61%   -0.03%     
==========================================
  Files         223      223              
  Lines       24710    24718       +8     
==========================================
+ Hits        22644    22646       +2     
- Misses       2066     2072       +6

Impacted Files	Coverage Δ
pyemma/_base/progress/reporter/notebook.py	6.89% <11.11%> (-1.11%)	⬇️
pyemma/coordinates/data/util/traj_info_backends.py	91.54% <0%> (+0.93%)	⬆️

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