cpc finetuner

[williamFalcon]

adds the finetuner for CPC

[williamFalcon]

@ananyahjha93 FYI

[williamFalcon]

@ananyahjha93 FYI

[codecov]

Codecov Report

Merging #158 into master will decrease coverage by 1.07%.
The diff coverage is 30.00%.

@@            Coverage Diff             @@
##           master     #158      +/-   ##
==========================================
- Coverage   91.94%   90.87%   -1.08%     
==========================================
  Files          84       86       +2     
  Lines        3974     4044      +70     
==========================================
+ Hits         3654     3675      +21     
- Misses        320      369      +49     

Flag	Coverage Δ
#unittests	90.87% <30.00%> (-1.08%)	⬇️

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Impacted Files	Coverage Δ
.../models/autoencoders/basic_vae/basic_vae_module.py	92.50% <ø> (ø)
pl_bolts/models/self_supervised/cpc/cpc_module.py	81.96% <ø> (ø)
..._bolts/models/self_supervised/cpc/cpc_finetuner.py	22.58% <22.58%> (ø)
pl_bolts/models/self_supervised/ssl_finetuner.py	34.21% <34.21%> (ø)
pl_bolts/models/self_supervised/__init__.py	100.00% <100.00%> (ø)

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