chore: update build system to remove hardcoded maven urls (#507)

Author: wooj2

build.gradle.kts

@@ -2,15 +2,16 @@
  * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
  * SPDX-License-Identifier: Apache-2.0.
  */
+
 plugins {
-    kotlin("jvm") version "1.5.0" apply false
+    kotlin("jvm") version "1.5.31" apply false
+    id("org.jetbrains.dokka")
 }
 
 allprojects {
     repositories {
         mavenLocal()
         mavenCentral()
-        jcenter()
     }
 }
 

buildSrc/build.gradle.kts

@@ -10,5 +10,6 @@ plugins {
 }
 
 repositories {
-    jcenter()
+    mavenLocal()
+    mavenCentral()
 }

gradle.properties

@@ -2,15 +2,18 @@ kotlin.code.style=official
 
 # codegen
 smithyVersion=1.13.1
+smithyGradleVersion=0.5.3
 
 smithySwiftVersion = 0.1.0
 
 # kotlin
-kotlinVersion=1.5.0
+kotlinVersion=1.5.31
+dokkaVersion=1.5.31
 kotlin.native.ignoreDisabledTargets=true
 
-
 # testing/utility
+kotlinxBenchmarkVersion=0.3.1
+
 # FIXME - junit5 not working
 ktlintVersion=0.40.0
 kotestVersion=4.0.5

settings.gradle.kts

@@ -5,11 +5,22 @@
 
 pluginManagement {
     repositories {
-        maven { url = uri("https://dl.bintray.com/kotlin/kotlin-eap") }
-        maven { url = uri("https://kotlin.bintray.com/kotlinx") }
-
+        mavenCentral()
+	maven("https://plugins.gradle.org/m2/")
+	google()
         gradlePluginPortal()
     }
+
+    plugins {
+        val kotlinVersion: String by settings
+        val dokkaVersion: String by settings
+        val kotlinxBenchmarkVersion: String by settings
+        val smithyGradleVersion: String by settings
+        id("org.jetbrains.dokka") version dokkaVersion
+        id("org.jetbrains.kotlin.jvm") version kotlinVersion
+        id("org.jetbrains.kotlinx.benchmark") version kotlinxBenchmarkVersion
+        id("software.amazon.smithy") version smithyGradleVersion
+    }
 }
 
 rootProject.name = "aws-sdk-swift"