Bump version to v0.5.4
Bump version to v0.5.4

jparyani/pycapnp,SymbiFlow/pycapnp,jparyani/pycapnp,SymbiFlow/pycapnp,tempbottle/pycapnp,SymbiFlow/pycapnp,rcrowder/pycapnp,jparyani/pycapnp,SymbiFlow/pycapnp,jparyani/pycapnp,tempbottle/pycapnp,rcrowder/pycapnp,tempbottle/pycapnp,rcrowder/pycapnp,tempbottle/pycapnp,rcrowder/pycapnp