old version of requests module in requirements.txt

[Karan Ahuja]

Error: blockcypher 1.0.73 has requirement requests==2.4.3, but you'll have requests 2.5.2 which is incompatible.

I can't downgrade requests as other libraries (like docker) are dependant on 2.5.2

[Huy Nguyen Quang]

👍

[Quentin Le Sceller]

Fixed by #68.