Build: Workaround IndexOutOfBoundsException on configuration with gradle 4.7

Using delegated property syntax somehow causes IndexOutOfBoundsException from kotlin-reflect, needs further investigation

Should be reverted after #KT-23413 is resolved

build.gradle.kts

@@ -286,7 +286,7 @@ allprojects {
     // therefore it is disabled by default
     // buildDir = File(commonBuildDir, project.name)
 
-    val repos: List<String> by rootProject.extra
+    val repos = rootProject.extra["repos"] as List<String>
     repositories {
         intellijSdkRepo(project)
         androidDxJarRepo(project)

build.gradle.kts.182

@@ -285,7 +285,7 @@ allprojects {
     // therefore it is disabled by default
     // buildDir = File(commonBuildDir, project.name)
 
-    val repos: List<String> by rootProject.extra
+    val repos = rootProject.extra["repos"] as List<String>
     repositories {
         intellijSdkRepo(project)
         androidDxJarRepo(project)

prepare/cidr-plugin/build.gradle.kts

@@ -20,7 +20,7 @@ dependencies {
 }
 
 val pluginXml by tasks.creating {
-    val kotlinVersion: String by rootProject.extra
+    val kotlinVersion = rootProject.extra["kotlinVersion"] as String
     val pluginFullVersionNumber = findProperty("pluginVersion") as? String
             ?: "$kotlinVersion-CIDR"