centralize vertx version

Author: BFergerson

monitor/skywalking/build.gradle.kts

@@ -3,14 +3,15 @@ plugins {
     id("com.apollographql.apollo").version("2.5.4")
 }
 
+val vertxVersion = ext.get("vertxVersion")
+
 dependencies {
     implementation(project(":protocol"))
     implementation("org.slf4j:slf4j-api:1.7.30")
     implementation("com.apollographql.apollo:apollo-runtime:2.5.4")
     implementation("com.apollographql.apollo:apollo-coroutines-support:2.5.4")
     api("com.apollographql.apollo:apollo-api:2.5.4")
 
-    val vertxVersion = "4.0.2"
     implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.4.2")
     implementation("io.vertx:vertx-core:$vertxVersion")
     implementation("io.vertx:vertx-lang-kotlin:$vertxVersion")