WS2P messages : protocol not respected in SOFTWARE_VERSION field

Dunitrust put the following value in the WS2P SOFTWARE_VERSION field:

0.3.0-dev

which raise en exception in DuniterPy as this field is checked against the protocol format:

x.y.z

see https://git.duniter.org/nodes/common/doc/blob/master/rfc/0004_ws2p_v1.md#message-field-1