update .gitignore

node_modules/undici/lib/web/fetch/symbols.js

@@ -0,0 +1,9 @@
+'use strict'
+
+module.exports = {
+  kUrl: Symbol('url'),
+  kHeaders: Symbol('headers'),
+  kSignal: Symbol('signal'),
+  kState: Symbol('state'),
+  kDispatcher: Symbol('dispatcher')
+}