Drop `request` and `request-promise` deps#19

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rtfeldman wants to merge 6 commits intoavh4:mainfrom

rtfeldman:remove-request

Commits on Aug 20, 2018

Use request-stream over request-promise
Richard Feldman
committed
Replace request with request-stream
Richard Feldman
committed
Remove request-stream in favor of plain http/https
Richard Feldman
committed

Commits on Sep 17, 2018

Refactor request() to take callbacks.
Richard Feldman
committed
Check for redirects.
Richard Feldman
committed
Add tests for redirect logic
Richard Feldman
committed