just use standard node octal notation

softprops · softprops · commit 008ef8c4d44b · 2020-07-03T23:12:39.000-04:00
diff --git a/index.js b/index.js
@@ -149,7 +149,7 @@ class RustPlugin {
       "bootstrap",
       readFileSync(path.join(sourceDir, binary)),
       "",
-      0o755 << 16
+      0755
     );
     const targetDir = this.localArtifactDir(profile);
     try {
