chore: bump snapshot version to 1.5.19-SNAPSHOT

Author: aws-sdk-kotlin-ci

gradle.properties

@@ -15,10 +15,10 @@ org.gradle.jvmargs=-Xmx2G -XX:MaxMetaspaceSize=1G
 org.gradle.parallel=true
 
 # SDK
-sdkVersion=1.5.18
+sdkVersion=1.5.19-SNAPSHOT
 
 # codegen
-codegenVersion=0.35.18
+codegenVersion=0.35.19-SNAPSHOT
 
 # FIXME Remove after Dokka 2.0 Gradle plugin is stable
 org.jetbrains.dokka.experimental.gradle.pluginMode=V2Enabled