Update base img and pip pkg

[naseemkullah]

In an effort to solve #13

As per @gochist suggestion

[gochist]

@naseemkullah I'm sorry that I deleted the suggestion when I found it doesn't fix the problem.

[naseemkullah]

np @gochist

I'll leave this open as it's a good idea to update anyways

For more info:
Python 3.7 features: https://realpython.com/python37-new-features/
Kubernetes client release notes: https://github.com/kubernetes-client/python/blob/master/CHANGELOG.md

[naseemkullah]

bump

[pulledtim]

Hi @naseemkullah and sorry for the delay. Thank you very much for your constribution

[naseemkullah]

My pleasure, thanks @Tim-Smyth !