tests: fix loading wasm when targeting external deps

Author: mochaaP

src/lexer.js

@@ -91,7 +91,12 @@ function copyLE (src, outBuf16) {
 }
 
 const loadWasm = (typeof EXTERNAL_PATH === "string" && (async () => {
-  return (await import('node:fs/promises')).readFile(EXTERNAL_PATH);
+  return (await import("node:fs/promises"))
+    .readFile(
+      (await import("node:url")).fileURLToPath(
+        import.meta.resolve("../lib/lexer.wasm")
+      )
+  );
 })) || (async () => {
   const binary = WASM_BINARY
   if (typeof window !== "undefined" && typeof atob === "function") {