Update to JTS 1.20.0 release

Author: jodygarnett

geowebcache/pom.xml

@@ -52,7 +52,7 @@
 
   <properties>
     <gt.version>32-SNAPSHOT</gt.version>
-    <jts.version>1.19.0</jts.version>
+    <jts.version>1.20.0</jts.version>
     <jaiext.version>1.1.26</jaiext.version>
     <spring.version>5.3.39</spring.version>
     <spring.security.version>5.7.12</spring.security.version>