Update build.gradle to next development version

Author: prestodb-ci

build.gradle

@@ -116,7 +116,7 @@ ext.tempto_runner = project(':tempto-runner')
 ext.tempto_ldap = project(':tempto-ldap')
 ext.tempto_kafka = project(':tempto-kafka')
 ext.expected_result_generator = project(':expected-result-generator')
-ext.tempto_version = '1.55'
+ext.tempto_version = '1.56-SNAPSHOT'
 ext.tempto_group = "io.prestodb.tempto"
 ext.isReleaseVersion = !tempto_version.endsWith("SNAPSHOT")