chore(deps): update autovalue packages to v1.6.6 (#334)

Author: renovate-bot

pom.xml

@@ -63,7 +63,7 @@
     <project.junit.version>4.12</project.junit.version>
     <project.guava.version>28.0-android</project.guava.version>
     <project.appengine.version>1.9.74</project.appengine.version>
-    <project.autovalue.version>1.6.5</project.autovalue.version>
+    <project.autovalue.version>1.6.6</project.autovalue.version>
     <project.findbugs.version>3.0.2</project.findbugs.version>
     <deploy.autorelease>false</deploy.autorelease>
   </properties>