Release 0.2.2

Author: silverbullettt

Diff for: gradle.properties

@@ -4,6 +4,6 @@ org.gradle.parallel=true
 # project-related properties
 projectGroupId=net.pascal-lab
 projectArtifactId=tai-e
-projectVersion=0.2.2-SNAPSHOT
+projectVersion=0.2.2
 projectUrl=https://github.com/pascal-lab/Tai-e
 projectDescription=An easy-to-learn/use static analysis framework for Java