[polari] entryArea: Stop using clicked() method

[Marge Bot <marge-bot src gnome org>]

commit 760f59fd1da01ae9a5620d6ddeae183341345050
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Aug 24 09:07:37 2021 +0200

    entryArea: Stop using clicked() method
    
    It's gone in GTK4 in favor of explicitly emitting the signal.
    
    Part-of: <https://gitlab.gnome.org/GNOME/polari/-/merge_requests/225>

 src/entryArea.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/entryArea.js b/src/entryArea.js
index b8193779..9bec113e 100644
--- a/src/entryArea.js
+++ b/src/entryArea.js
@@ -258,7 +258,7 @@ export default GObject.registerClass({
                 keyval === Gdk.KEY_BackSpace ||
                 keyval === Gdk.KEY_Delete ||
                 keyval === Gdk.KEY_z && mods & Gdk.ModifierType.CONTROL_MASK) {
-                this._cancelButton.clicked();
+                this._cancelButton.emit('clicked');
                 return Gdk.EVENT_STOP;
             }
             return Gdk.EVENT_PROPAGATE;