Bump version to v0.2.2

Author: nakamuuu

build.gradle

@@ -3,8 +3,8 @@ buildscript {
         compile_sdk_version = 31
         min_sdk_version = 26
         target_sdk_version = 31
-        version_name = "0.2.1"
-        version_code = 3
+        version_name = "0.2.2"
+        version_code = 4
         compose_version = '1.1.0-alpha06'
         junit_version = '4.13.2'
     }