Web Dev w/Clj 3e (vB17.0): Unknown dbtype - conman 0.8.4 broken. Fix: upgrade to 0.9.1

Title: Web Development with Clojure 3e (vB17.0): Unknown dbtype (ch1 tests) p 15

Using conman version 0.8.4 brings the following error:

ERROR in (test-messages) (connection.clj:199)
Uncaught exception, not in assertion.
expected: nil
  actual: clojure.lang.ExceptionInfo: Unknown dbtype: 
{:datasource #object[com.zaxxer.hikari.HikariDataSource 0x4953c5f8 "HikariDataSource (HikariPool-1)"]}

Upgrading conman to “0.9.1” is an easy solution.