fixup! fix(@angular/build): add define option to dev-server

Author: alan-agius4

goldens/public-api/angular/build/index.api.md

@@ -112,6 +112,9 @@ export enum BuildOutputFileType {
 export type DevServerBuilderOptions = {
     allowedHosts?: AllowedHosts;
     buildTarget: string;
+    define?: {
+        [key: string]: string;
+    };
     headers?: {
         [key: string]: string;
     };