build: Use Kotlin DSL accessors in build.gradle.kts files (#62)

Take advantage of the features of Kotlin DSL by using accessors in `build.gradle.kts` files.

Author: thorlauridsen

apps/api/build.gradle.kts

@@ -38,6 +38,6 @@ dependencies {
 	testRuntimeOnly(local.junit.platform.launcher)
 }
 
-tasks.withType<Test> {
+tasks.test {
 	useJUnitPlatform()
 }

modules/persistence/build.gradle.kts

@@ -1,6 +1,3 @@
-import org.springframework.boot.gradle.tasks.bundling.BootJar
-import org.springframework.boot.gradle.tasks.run.BootRun
-
 plugins {
     alias(local.plugins.lombok)
     alias(local.plugins.springboot)
@@ -17,9 +14,9 @@ dependencies {
 
 // Disabling bootJar and bootRun is necessary for a subproject/module
 // that uses the Spring Boot plugin but is not supposed to be executable.
-tasks.named<BootJar>("bootJar") {
+tasks.bootJar {
     enabled = false
 }
-tasks.named<BootRun>("bootRun") {
+tasks.bootRun {
     enabled = false
 }