[gtksourceview/ricotz/vala] vala: Mark CompletionProposal.get_typed_text as virtual

[Rico Tzschichholz <ricotz src gnome org>]

commit 578cbd6505e9485fe53bab1f58c71cd82ac36be1
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sun Sep 4 16:44:07 2022 +0200

    vala: Mark CompletionProposal.get_typed_text as virtual
    
    Interface method which have a default implementation can be marked
    virtual instead of abstract. This avoids an error for a missing
    implementation of an abstract method.

 gtksourceview/GtkSource-5.metadata | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/gtksourceview/GtkSource-5.metadata b/gtksourceview/GtkSource-5.metadata
new file mode 100644
index 00000000..83c010d6
--- /dev/null
+++ b/gtksourceview/GtkSource-5.metadata
@@ -0,0 +1,2 @@
+CompletionProposal
+  .get_typed_text#virtual_method virtual