Bump version to 0.60

Summary: Version bump to 0.60

Reviewed By: strulovich

Differential Revision: D89397963

fbshipit-source-id: de64a70d0560164f37ba982dafbea437fcdcba94

Author: Nivaldo Bondança

CHANGELOG.md

@@ -10,7 +10,7 @@ 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]
+## [0.60]
 
 ### Added
 - Support for `else if` guard conditions (https://github.com/facebook/ktfmt/pull/563)

gradle.properties

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