TBR java/syncbase: Prepare for 0.1.6

I recently released 0.1.5 and found it very convenient for testing if
our repo has the version _after_ the currently released version. Since
we plan to make a lot of changes, I think this will be useful and okay
to do.

Change-Id: I2da137004243b0994354aa3870e6154914486b38
diff --git a/syncbase/build.gradle b/syncbase/build.gradle
index 25bbe92..f971ff0 100644
--- a/syncbase/build.gradle
+++ b/syncbase/build.gradle
@@ -19,7 +19,7 @@
 
 // You should update this after releasing a new version of the Syncbase API. See the
 // list of published versions at: https://repo1.maven.org/maven2/io/v/syncbase
-version = '0.1.5'
+version = '0.1.6'
 group = 'io.v'
 
 def siteUrl = 'https://github.com/vanadium/java/syncbase'