misc: jar reduction - use prop helper function instead of property function (#166)

Author: 0marperez

build-plugins/build-support/src/main/kotlin/aws/sdk/kotlin/gradle/publishing/JarReduction.kt

@@ -6,6 +6,7 @@
 package aws.sdk.kotlin.gradle.publishing
 
 import aws.sdk.kotlin.gradle.util.getOrNull
+import aws.sdk.kotlin.gradle.util.prop
 import org.gradle.api.Project
 import org.gradle.api.Task
 import org.gradle.api.publish.PublishingExtension
@@ -19,7 +20,7 @@ import proguard.gradle.ProGuardTask
 import java.io.File
 
 fun Project.configureJarReduction(group: String) {
-    val jarReductionEnabled = project.findProperty("aws.sdk.proguard") as String? == "true"
+    val jarReductionEnabled = prop("aws.sdk.proguard") as String? == "true"
     if (!jarReductionEnabled) return
 
     val testLocalJarReplacementTasks = mutableSetOf<Task>()