Bump version to 0.2.1

Author: Weiyi Li

view/build.gradle

@@ -10,7 +10,7 @@ android {
         minSdkVersion vMinSdk
         targetSdkVersion vTargetSdk
         versionCode 1
-        versionName "0.2.0"
+        versionName "0.2.1"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         consumerProguardFiles 'consumer-rules.pro'