(maint) Update clj-parent to 4.8.0

This includes an update of jdbc to 0.7.11, as well as updates from
tk-jetty9 to allow TLSv1.3 connections by default.

Author: austb

project.clj

@@ -1,6 +1,6 @@
 (def pdb-version "6.18.3-SNAPSHOT")
 
-(def clj-parent-version "4.6.29")
+(def clj-parent-version "4.8.0")
 
 (defn true-in-env? [x]
   (#{"true" "yes" "1"} (System/getenv x)))