Release 0.2.1

gradle.properties

@@ -1,4 +1,4 @@
-version=0.2.1-SNAPSHOT
+version=0.2.1
 springBootVersion=2.5.7
 org.gradle.jvmargs=-Xmx3g -XX:MaxPermSize=2048m -XX:+HeapDumpOnOutOfMemoryError
 org.gradle.parallel=true