build: bump release 0.2.1

Author: ujizin

buildSrc/src/main/kotlin/ujizin/camposer/Config.kt

@@ -4,8 +4,8 @@ object Config {
     const val compileSdk = 33
     const val targetSdk = 33
     const val minSdk = 21
-    const val versionCode = 3
-    const val versionName = "0.2.0"
+    const val versionCode = 4
+    const val versionName = "0.2.1"
     const val groupId = "io.github.ujizin"
     const val artifactId = "camposer"
 }