Next development version

gradle.properties

@@ -1,7 +1,7 @@
 aspectjVersion=1.9.3
 gaeVersion=1.9.78
 springBootVersion=2.2.5.RELEASE
-version=5.4.0-M1
+version=5.4.0-SNAPSHOT
 kotlinVersion=1.3.70
 org.gradle.jvmargs=-Xmx3g -XX:MaxPermSize=2048m -XX:+HeapDumpOnOutOfMemoryError
 org.gradle.parallel=true