Replaced annotation processor to kapt (#555)

Author: Goregius

graphql-kotlin-spring-server/build.gradle.kts

@@ -2,6 +2,7 @@ description = "Spring Boot autoconfiguration library for creating reactive Graph
 
 plugins {
     id("org.jetbrains.kotlin.plugin.spring")
+    kotlin("kapt")
 }
 
 val kotlinCoroutinesVersion: String by project
@@ -12,8 +13,7 @@ val reactorExtensionsVersion: String by project
 dependencies {
     api(project(path = ":graphql-kotlin-federation"))
     api("org.springframework.boot:spring-boot-starter-webflux:$springBootVersion")
-    // TODO change below from api to implementation?
-    api("org.springframework.boot:spring-boot-configuration-processor:$springBootVersion")
+    kapt("org.springframework.boot:spring-boot-configuration-processor:$springBootVersion")
     api("io.projectreactor.kotlin:reactor-kotlin-extensions:$reactorExtensionsVersion")
     api("org.jetbrains.kotlinx:kotlinx-coroutines-reactor:$kotlinCoroutinesVersion")
     testImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-test:$kotlinCoroutinesVersion")