Build: Fix artifacts signing for maven central

With gradle > 5.0 `publish()` helper call should be done before
`noDefaultJar()` or any other artifact hacks, otherwise singing plugin doesn't sign any jars

plugins/sam-with-receiver/sam-with-receiver-cli/build.gradle.kts

@@ -23,13 +23,13 @@ sourceSets {
     "test" { projectDefault() }
 }
 
+publish()
+
 val jar = runtimeJar {}
 sourcesJar()
 javadocJar()
 testsJar {}
 
-publish()
-
 dist {
     rename("kotlin-", "")
 }