Update to Logback 1.4.8

Closes gh-777

Author: jzheaux

dependencies/build.gradle

@@ -23,7 +23,7 @@ dependencies {
 		api "com.querydsl:querydsl-apt:$queryDslVersion"
 		api "commons-pool:commons-pool:1.6"
 		api "org.apache.commons:commons-pool2:2.11.1"
-		api "ch.qos.logback:logback-classic:1.4.7"
+		api "ch.qos.logback:logback-classic:1.4.8"
 		api "com.google.code.typica:typica:1.7.2"
 		api "com.unboundid:unboundid-ldapsdk:6.0.8"
 		api "commons-codec:commons-codec:1.15"