Bump pretrained weights to 0.6.0

[ethanwharris]

What does this PR do?

Fixes # (issue)

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Codecov Report

Merging #940 (bc17684) into master (eec8485) will increase coverage by 2.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #940      +/-   ##
==========================================
+ Coverage   86.29%   88.32%   +2.03%     
==========================================
  Files         242      242              
  Lines       13053    13053              
==========================================
+ Hits        11264    11529     +265     
+ Misses       1789     1524     -265     

Flag	Coverage Δ
unittests	88.32% <ø> (+2.03%)	⬆️

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Impacted Files	Coverage Δ
flash/core/data/data_pipeline.py	95.67% <0.00%> (+0.30%)	⬆️
flash/core/data/process.py	85.71% <0.00%> (+0.38%)	⬆️
flash/image/classification/adapters.py	82.58% <0.00%> (+0.44%)	⬆️
flash/core/data/batch.py	95.78% <0.00%> (+0.60%)	⬆️
flash/core/data/data_module.py	94.90% <0.00%> (+1.45%)	⬆️
flash/core/model.py	88.16% <0.00%> (+1.63%)	⬆️
flash/core/data/callback.py	100.00% <0.00%> (+2.66%)	⬆️
flash/core/data/base_viz.py	100.00% <0.00%> (+4.00%)	⬆️
flash/image/segmentation/heads.py	95.65% <0.00%> (+4.34%)	⬆️
flash/core/data/data_source.py	94.80% <0.00%> (+4.54%)	⬆️
... and 20 more

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