Revert "#2309 Removes unused dependency"

This reverts commit 6eb56d9.

Author: Merlin Rabens

build.sbt

@@ -23,6 +23,7 @@ lazy val root = (project in file("."))
       "org.mapdb" % "mapdb" % "3.0.8",
       "org.tpolecat" %% "doobie-core" % "0.9.0",
       "org.tpolecat" %% "doobie-hikari" % "0.9.0",
+      "com.google.guava" % "guava" % "30.0-jre",
       "com.disneystreaming" %% "weaver-framework" % "0.5.0" % "test",
       "com.disneystreaming" %% "weaver-scalacheck" % "0.4.3" % "test",
       "org.tpolecat" %% "doobie-h2" % "0.9.0" % "test"