Register pipe.close() method

Allows kill() method of unix PTY node to be called without error.

CHANGELOG.md

@@ -11,6 +11,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   `libgodot-xterm.osx.64.dylib` is now a universal binary that runs natively
   on both x86_64 and arm64.
 
+### Fixed
+- The `kill()` method of unix PTY node can now be called without error as the underlying
+  `pipe.close()` method of the gdnative library is now registered.
+
+
 ## [v2.0.0](https://github.com/lihop/godot-xterm/compare/v1.2.1...v2.0.0) - 2021-07-25
 ### Added
 - Terminal editor plugin. Adds integrated terminal to Godot editor.

addons/godot_xterm/native/src/pipe.cpp

@@ -25,6 +25,7 @@ void Pipe::_register_methods() {
   register_method("poll", &Pipe::_poll_connection);
   register_method("open", &Pipe::open);
   register_method("write", &Pipe::write);
+  register_method("close", &Pipe::close);
 
   register_signal<Pipe>("data_received", "data",
                         GODOT_VARIANT_TYPE_POOL_BYTE_ARRAY);