Add upadate sklearn, python and pytorch-forecasting versions

[alex-hse-repository]

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Before submitting (must do checklist)

• Did you read the contribution guide?
• Did you update the docs? We use Numpy format for all the methods and classes.
• Did you write any new necessary tests?
• Did you update the CHANGELOG?

Type of Change

• Examples / docs / tutorials / contributors update
• Bug fix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves an existing feature)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Proposed Changes

Related Issue

Closing issues

closes #387

[codecov-commenter]

Codecov Report

Merging #445 (dd4b0a4) into master (cf95197) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #445      +/-   ##
==========================================
- Coverage   87.64%   87.63%   -0.01%     
==========================================
  Files         112      112              
  Lines        5276     5275       -1     
==========================================
- Hits         4624     4623       -1     
  Misses        652      652              

Impacted Files	Coverage Δ
etna/datasets/tsdataset.py	89.86% <ø> (ø)
etna/ensembles/stacking_ensemble.py	98.30% <ø> (ø)
etna/transforms/nn/pytorch_forecasting.py	95.23% <100.00%> (-0.06%)	⬇️

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[martins0n]

👍