Bump version to 0.60-SNAPSHOT

Summary: Version bump to 0.60-SNAPSHOT

Reviewed By: cortinico

Differential Revision: D83262337

fbshipit-source-id: a278a91d9b1a4281e83a615c00d0d7f8975987f8

Author: Nivaldo Bondança

CHANGELOG.md

@@ -10,6 +10,11 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/).
 - All styles managing trailing commas now (https://github.com/facebook/ktfmt/issues/216, https://github.com/facebook/ktfmt/issues/442)
 
 
+## [Unreleased]
+
+### Changed
+
+
 ## [0.59]
 
 ### Fixed

gradle.properties

@@ -1,3 +1,3 @@
-ktfmt.version=0.59
+ktfmt.version=0.60-SNAPSHOT
 kotlin.code.style=official
 org.gradle.jvmargs=-Xmx2G