fix: use strictRequires: true (#8958)

fixes #8891

Author: Rich-Harris

.changeset/good-carrots-flow.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/adapter-node': patch
+---
+
+fix: use `strictRequires: true` when bundling output

packages/adapter-node/index.js

@@ -57,7 +57,7 @@ export default function (opts = {}) {
 					// dependencies could have deep exports, so we need a regex
 					...Object.keys(pkg.dependencies || {}).map((d) => new RegExp(`^${d}(\\/.*)?$`))
 				],
-				plugins: [nodeResolve({ preferBuiltins: true }), commonjs(), json()]
+				plugins: [nodeResolve({ preferBuiltins: true }), commonjs({ strictRequires: true }), json()]
 			});
 
 			await bundle.write({