Bump version 1.5.6
Bump version 1.5.6

h0vhannes/ripple-client,vhpoet/ripple-client,h0vhannes/ripple-client,vhpoet/ripple-client,vhpoet/ripple-client,h0vhannes/ripple-client,h0vhannes/ripple-client,vhpoet/ripple-client