fix failing tests

Author: ChristopherDedominici

v-next/hardhat/test/internal/core/hook-manager.ts

@@ -428,6 +428,7 @@ describe("HookManager", () => {
           hookHandlers: {
             config: import.meta.resolve("./non-existent.js"),
           },
+          npmPackage: null,
         };
 
         const manager = new HookManagerImplementation(projectRoot, [

v-next/hardhat/test/internal/core/tasks/task-manager.ts

@@ -2096,6 +2096,7 @@ describe("TaskManagerImplementation", () => {
                     .setAction("file://not-a-module")
                     .build(),
                 ],
+                npmPackage: null,
               },
             ],
           },