v0.9.0

• BREAKING: Fix term:start() calling on_create callback instead of on_start. on_create has been removed.
• BREAKING: Remove term:is_stopped() method. Use not term:is_started() instead.
• BREAKING: Filetype renamed from ErgoTerm to ergoterm.
• DEPRECATED API require("ergoterm.terminal") use require("ergoterm") instead.
• Add target option to commands to specify terminal by name.
• term:update() accepts a deep_merge option to merge table settings instead of replacing them.
• Added term:is_cleaned_up() method to check if terminal has been cleaned up.
• Show error if invalid layout is provided on opening terminal.
• Set buffer options on start instead of on opening terminal window.
• Add term:unfocus(winid?).
• Names are guaranteed to be unique now by appending a number suffix if needed.