built-in cosine similarity and fix warning

adamp 0.3.0 release note

• Change manual cosine similarity to Pytorch built-in F.cosine_similarity #6
• Fix Pytorch 1.5 warning #5
• https://pypi.org/project/adamp/0.3.0/

Nesterov supports

adamp 0.2.0 release note

• Nesterov support: 16e34cf
• https://pypi.org/project/adamp/0.2.0/

PyPI supports

adamp 0.1.0 release note

• PyPI supports
  • https://pypi.org/project/adamp/0.1.0/

from adamp import SGDP, AdamP