[Feature] Bump version to v2.1.2.

Author: zhanghai

gradle.properties

@@ -17,8 +17,8 @@
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
 
-VERSION_NAME=2.1.1
-VERSION_CODE=8
+VERSION_NAME=2.1.2
+VERSION_CODE=9
 GROUP=me.zhanghai.android.patternlock
 
 POM_DESCRIPTION=A Material Design pattern lock library