Don't serialize buffers (#39)

index.d.ts

@@ -12,6 +12,7 @@ Serialize an `Error` object into a plain object.
 
 Non-error values are passed through.
 Custom properties are preserved.
+Buffer properties are replaced with `[object Buffer]`.
 Circular references are handled.
 
 @example

index.js

@@ -36,6 +36,11 @@ const destroyCircular = ({from, seen, to_, forceEnumerable}) => {
 	seen.push(from);
 
 	for (const [key, value] of Object.entries(from)) {
+		if (Buffer.isBuffer(value)) {
+			to[key] = '[object Buffer]';
+			continue;
+		}
+
 		if (typeof value === 'function') {
 			continue;
 		}

readme.md

@@ -43,6 +43,7 @@ Non-error values are passed through.
 Custom properties are preserved.
 Non-enumerable properties are kept non-enumerable (name, message, stack).
 Enumerable properties are kept enumerable (all properties besides the non-enumerable ones).
+Buffer properties are replaced with `[object Buffer]`.
 Circular references are handled.
 
 ### deserializeError(value)

test.js

@@ -75,6 +75,12 @@ test('should discard nested functions', t => {
 	t.deepEqual(serialized, {});
 });
 
+test('should discard buffers', t => {
+	const object = {a: Buffer.alloc(1)};
+	const serialized = serializeError(object);
+	t.deepEqual(serialized, {a: '[object Buffer]'});
+});
+
 test('should replace top-level functions with a helpful string', t => {
 	function a() {}
 	function b() {}