Fix minor build-related bugs

Author: adams85

.npmignore

@@ -12,6 +12,7 @@ DEPLOY.md
 deno.*
 deno.*.*
 deploy.sh
+eslint.config.mjs
 extra-checks/
 gulpfile.js
 karma.*.conf.js

gulpfile.js

@@ -88,7 +88,7 @@ async function postProcess(targetId, targetFile, targetDir, { importExtension, r
       // Fix extensions of referenced files in export/import statements.
       let fileContent = await fsp.readFile(file, "utf8");
       const isEsm = addModulePackageJson || isDts;
-      fileContent = (isEsm ? fixEsmImports : fixCjsImports)(targetDir, fileContent, importExtension);
+      fileContent = (isEsm ? fixEsmImports : fixCjsImports)(path.dirname(file), fileContent, importExtension);
       if (fileContent != null) await fsp.writeFile(file, fileContent, "utf8", { flush: true });
     }
   }