Move pubkey check and checksum to DuniterPy

Move implementations to DuniterPy

• duniterpy#131: Implement checksum computation
• #341 (closed): Implement base58 Python module checksum feature
• Use DuniterPy implementation

changed milestone to %0.10.0

added DuniterPy label

marked this issue as related to #176 (closed)

marked this issue as related to #341 (closed)

marked this issue as related to duniterpy#131

changed milestone to %Backlog

added TBR label

Pubkey checksum is no longer a topic with Substrate.

closed

removed TBR label