Bump version to 0.5.0.
Bump version to 0.5.0.

cargomedia/pulsar-rest-api,cargomedia/pulsar-rest-api,vogdb/pulsar-rest-api,njam/pulsar-rest-api,vogdb/pulsar-rest-api,njam/pulsar-rest-api,njam/pulsar-rest-api,njam/pulsar-rest-api,cargomedia/pulsar-rest-api,cargomedia/pulsar-rest-api,vogdb/pulsar-rest-api