Dependencies severely out of date (and vulnerable: CVEs)

[puckipedia]

Steps to reproduce:

1. Try to install bunq_sdk with only the newest versions of the dependencies installed. (e.g. via the operating system's package manager)

What should happen:

1. bunq_sdk installs and is secure.

What happens:

1. Could not find a version that satisfies the requirement urllib3==1.21.1, among other issues

SDK version and environment

• Tested on 0.10.16 (y'all's issue template is wrong too)

Extra info:

in pycryptodome(x): CVE-2018-15560 (an AES crypto vuln) and so on have been fixed last year; but the dependencies are hard-coded to those of two years ago, meaning that any installation of the bunq python SDK is vulnerable.

[angelomelonas]

All dependencies were upgraded to latest in this pull request: #128