All work

PostgresClient futurisation for Vert.x 4, Part 2

Remove JDBC driver, use vertx-pg-client for running migrations

SELECT jsonb::text to avoid JsonObject creation

Update to new Vert.x 4 HttpClient functions

PostgresClient futurisation for Vert.x 4, Part 1

PgUtil futurisation for Vert.x 4

migrate deprecated/removed Future calls in preparation for vert.x4 migration

migrate to reactive postgres client (vertx-pg-client)

Upgrade to Vert.x 4.0 milestone 4

Switch from vertx.core.logging.Logger to org.apache.logging.log4j.Logger

Switch from Future to Promise and others, phase 1 (Vert.x 3.7 series)

Stop using deprecated functions, phase 2 (Vert.x 3.7 series)