Release v0.2.3

What's New

Config File Permissions (by @vitor-mariano, #121): Config files created before the 0600 mode was introduced kept their original (world-readable) permissions because os.WriteFile only applies the mode on creation. Vi Mongo now chmods existing config files to 0600 on load.
Enable Paste & Default Exit Key: The EnablePaste option was missing from the TUI initialisation, which could interfere with pasting in some terminals. The implicit q exit binding has also been removed to avoid exiting by accident.

Thank you to everyone who contributed to and tested this release!