New commands and improvements! v1.1.0

• New command: toggle_autoclose will turn the autoclosing feature on and off
• When closing unpinned buffers we will check whether the buffer is displayed in any window and avoid closing it
• Two new configuration options: close_command will let you modify the command used for closing buffers, by default its nvim_buf_delete. close_buffers_with_windows lets one choose whether they want buffers buffers currently displayed in windows to be closed by autoclose and close_unpinned

Big thank you @ditsuke for the contribution!