docs: new default options

lib/default-config.js

@@ -2,6 +2,13 @@
  * @module BrowserSync.options
  */
 module.exports = {
+
+    /**
+     * @property cwd
+     * @type string
+     * @since 2.23.0
+     */
+
     /**
      * Browsersync includes a user-interface that is accessed via a separate port.
      * The UI allows to controls all devices, push sync updates and much more.
@@ -35,6 +42,35 @@ module.exports = {
      */
     watchEvents: ["change"],
 
+    /**
+     * Watch files automatically
+     * @property watch
+     * @type Boolean
+     * @default false
+     * @since 2.23.0
+     */
+    watch: false,
+
+    /**
+     * Patterns for any watchers to ignore. Anything provided here
+     * will end up inside `watchOptions.ignored`
+     * @property ignore
+     * @type Array
+     * @default []
+     * @since 2.23.0
+     */
+    ignore: [],
+
+    /**
+     * Serve an index.html file for all non-asset routes. Useful
+     * when using client-routers
+     * @property single
+     * @type Boolean
+     * @default false
+     * @since 2.23.0
+     */
+    single: false,
+
     /**
      * File watching options that get passed along to [Chokidar](https://github.com/paulmillr/chokidar).
      * Check their docs for available options