Dependency net-keepalive unable to install without python

[noynir]

Describe the bug
The ffi-napi package required by net-keepalive is built with node-gyp which requires python. This breaks on alpine docker images which don't include python

** Client Version **
0.14.2

To Reproduce
Create a node Docker image based on an alpine version and RUN npm install.

Expected behavior
stay compatible with alpine images.

Environment (please complete the following information):

• OS: Linux (Alpine)

Additional context
Add any other context about the problem here.

[brendandburns]

This is fixed by #635

[brendandburns]

#635 has merged. Closing.