Bump up version to 0.2.1

lm2343635 · lm2343635 · commit 35ef0c6a5400 · 2020-08-25T23:24:51.000+09:00
diff --git a/pluto-kotlin-client-sdk/build.gradle b/pluto-kotlin-client-sdk/build.gradle
@@ -5,7 +5,7 @@ apply plugin: 'maven-publish'
 
 buildscript {
     ext.versionCode = 11
-    ext.versionName = '0.2'
+    ext.versionName = '0.2.1'
 }
 
 android {
