Fix dependency management.

demo-application/build.gradle.kts

@@ -0,0 +1,11 @@
+plugins {
+    kotlin("jvm")
+    id("io.spring.dependency-management") version "1.1.7"
+    id("java")
+}
+
+dependencies {
+    implementation(kotlin("stdlib"))
+    implementation(project(":demo-domain"))
+    implementation("org.springframework:spring-context")
+}