deps: update dependency org.threeten:threetenbp to v1.6.0 (#633)

Author: renovate-bot

java-shared-dependencies/third-party-dependencies/pom.xml

@@ -58,7 +58,7 @@
     <site.installationModule>${project.artifactId}</site.installationModule>
 
     <gson.version>2.9.0</gson.version>
-    <threeten.version>1.5.2</threeten.version>
+    <threeten.version>1.6.0</threeten.version>
     <javax.annotations.version>1.3.2</javax.annotations.version>
     <animal-sniffer.version>1.21</animal-sniffer.version>
     <opencensus.version>0.31.0</opencensus.version>