Maintenance issues

[jdb78]

Description

This PR ...

Checklist

• Linked issues (if existing)
• Amended changelog for large changes (and added myself there as contributor)
• Added/modified tests
• Used pre-commit hooks when committing to ensure that code is compliant with hooks. Install hooks with pre-commit install.
  To run hooks independent of commit, execute pre-commit run --all-files

Make sure to have fun coding!

[codecov-commenter]

Codecov Report

Merging #688 (95d8491) into master (d90fbcb) will increase coverage by 0.13%.
The diff coverage is 96.15%.

@@            Coverage Diff             @@
##           master     #688      +/-   ##
==========================================
+ Coverage   89.87%   90.01%   +0.13%     
==========================================
  Files          24       24              
  Lines        3714     3734      +20     
==========================================
+ Hits         3338     3361      +23     
+ Misses        376      373       -3     

Flag	Coverage Δ
cpu	90.01% <96.15%> (+0.13%)	⬆️
pytest	90.01% <96.15%> (+0.13%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pytorch_forecasting/data/timeseries.py	93.35% <ø> (ø)
pytorch_forecasting/models/base_model.py	90.07% <96.00%> (+0.14%)	⬆️
pytorch_forecasting/data/encoders.py	86.53% <100.00%> (ø)
pytorch_forecasting/models/nn/rnn.py	92.40% <0.00%> (+5.06%)	⬆️

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