Update dependency com.google.code.gson:gson to v2.8.6

Author: renovate-bot

build.gradle

@@ -24,7 +24,7 @@ dependencies {
     compile group: 'com.beust', name: 'jcommander', version: '1.78'
 
     // For parsing JSON
-    compile group: 'com.google.code.gson', name: 'gson', version: '2.8.5'
+    compile group: 'com.google.code.gson', name: 'gson', version: '2.8.6'
 
     // For making async HTTP requests
     compile group: 'org.apache.httpcomponents', name: 'httpasyncclient', version: '4.1.4'