0.2.1

• Ensure that all error messages end with a period.
• Documentation fixes.
• Opt-in to rubygem.org MFA requirement.

CommandKit::Printing

• Auto-detect whether CommandKit::CommandName#command_name #command_name is
  available, and if so, prepend the command name to all error messages.

CommandKit::Help::Man

• Expand the path given to
  CommandKit::Help::Man::ClassMethods#man_dir man_dir.
• If CommandKit::Help::Man::ClassMethods#man_dir man_dir is not set, fallback
  to regular --help output.

CommandKit::Arguments

• Include CommandKit::Usage and CommandKit::Printing into
  CommandKit::Arguments.

CommandKit::Options

• Include CommandKit::Arguments into CommandKit::Options.
• Ensure that CommandKit::Options::Parser#main runs before
  CommandKit::Arguments#main.
• Ensure that CommandKit::Options#help also calls
  CommandKit::Arguments#help_arguments.
• Always prepopulate CommandKit::Options#options #options with option's
  default values.
  • Note: if an option has a default value but the option's value is not
    required (ex: value: required: false, default: "foo"``), and the option's
    flag is given but no value is given (ex: --option-flag --some-other-flag),
    the option's value in `CommandKit::Options#options #options` will be `nil`
    not the option's default value (`"foo"`). This helps indicate that the
    option's flag was given but no value was given with it.

CommandKit::Options::OptionValue

• When a Class is passed to CommandKit::Options::OptionValue.default_usage,
  demodularize the class name before converting it to underscored/uppercase.

CommandKit::Command

• Fixed the inclusion order of CommandKit::Options and
  CommandKit::Arguments.

CommandKit::Commands

• Define the COMMAND and ARGS arguments.
• Correctly duplicate the CommandKit::Env#env env (which can be either ENV
  or a Hash) to work on ruby-3.1.0-preview1.
• Print command aliases that were set explicitly
  (ex: command_aliases['rm'] = 'remove') in CommandKit::Commands#help.
• Print help and exit with status 1 if no command is given. This matches the
  behavior of the git command.

CommandKit::Commands::AutoLoad

• Ensure that any explicit command aliases are added to the command's
  CommandKit::Commands::ClassMethods#command_aliases command_aliases.