A-Gradle: Use A-Gradle

build.gradle: Update the main class to "William" and enable assertions

Author: KhoonSun47

build.gradle

@@ -28,15 +28,16 @@ test {
 }
 
 application {
-    mainClass.set("seedu.duke.Duke")
+    mainClass.set("William")
 }
 
 shadowJar {
-    archiveBaseName = "duke"
+    archiveBaseName = "William"
     archiveClassifier = null
     dependsOn("distZip", "distTar")
 }
 
 run{
     standardInput = System.in
-}
+    enableAssertions = true
+}