Update cbindgen and enable MouseCursor::move

cbindgen 0.21 was released which contains https://github.com/eqrion/cbindgen/pull/724
which allow to use raw identifier in enums shared with C++.
So now we can have `MouseCursor.move` in slint  despite it being a rust keyword

Note that the strum macro also have trouble with the raw identifier, so we
take that in account in the conversion functions in the interpreter

internal/compiler/typeregister.rs

@@ -216,6 +216,7 @@ impl TypeRegister {
                 "text",
                 "alias",
                 "copy",
+                "move",
                 "no-drop",
                 "not-allowed",
                 "grab",