New upstream release 1.4.0. Notable changes:

• Add tests for zwp_text_input_unstable_v3
• Add tests for zwp_input_method_unstable_v2
• Add tests for zwlr_layer_shell_v1 version 4
• Drop requirement for compositors to implement wl_shell. Tests which require an arbitrary “visible surface” should now only require one of xdg_shell, xdg_shell_unstable_v6, or wl_shell.
• Fix expectations of keyboard focus for xdg_popup tests to match the protocol. NOTE: These tests will fail on many compositors, including Weston, as is is common to not follow the protocol correctly here.