Fix versioning issues, typos and tests

[jonhare]

Fix versioning issues, typos and tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (3cd8f7b) 98.89% compared to head (fed46e2) 98.89%.

❗ Current head fed46e2 differs from pull request most recent head 5d3926f. Consider uploading reports for the commit 5d3926f to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #672   +/-   ##
=======================================
  Coverage   98.89%   98.89%           
=======================================
  Files          44       44           
  Lines        3427     3427           
=======================================
  Hits         3389     3389           
  Misses         38       38           

Files	Coverage Δ
torchbearer/bases.py	90.95% <100.00%> (+0.04%)	⬆️
torchbearer/callbacks/gradient_clipping.py	100.00% <ø> (ø)
torchbearer/callbacks/manifold_mixup.py	100.00% <100.00%> (ø)
torchbearer/callbacks/mixup.py	98.24% <100.00%> (+0.03%)	⬆️
torchbearer/callbacks/tensor_board.py	100.00% <100.00%> (ø)
torchbearer/callbacks/torch_scheduler.py	98.70% <100.00%> (-0.05%)	⬇️
torchbearer/metrics/decorators.py	100.00% <ø> (ø)
torchbearer/metrics/wrappers.py	100.00% <ø> (ø)

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