Update thor requirement from ~> 0.19.4 to ~> 0.20.3

[dependabot-preview]

Updates the requirements on thor to permit the latest version.

Changelog

Sourced from thor's changelog.

0.20.3

• Support old versions of did_you_mean.

0.20.2

• Fix did_you_mean support.

0.20.1

• Support new versions of ERB.
• Fix check_unknown_options! to not check the content that was not parsed, i.e. after a -- or after the first unknown with stop_on_unknown_option!
• Add did_you_mean support.

0.20.0

• Add check_default_type! to check if the default value of an option matches the defined type.
  It removes the warning on usage and gives the command authors the possibility to check for programming errors.

• Add disable_required_check! to disable check for required options in some commands.
  It is a substitute of disable_class_options that was not working as intended.

• Add inject_into_module.

0.19.4, release 2016-11-28

• Rename Thor::Base#thor_reserved_word? to #is_thor_reserved_word?

0.19.3, release 2016-11-27

• Output a warning instead of raising an exception when a default option value doesn't match its specified type

0.19.2, release 2016-11-26

• Fix bug with handling of colors passed to ask (and methods like yes? and no? which it underpins)
• Allow numeric arguments to be negative
• Ensure that default option values are of the specified type (e.g. you can't specify "foo" as the default for a numeric option), but make symbols and strings interchangeable
• Add Thor::Shell::Basic#indent method for intending output
• Fix remove_command for an inherited command (see #451)
• Allow hash arguments to only have each key provided once (see #455)
• Allow commands to disable class options, for instance for "help" commands (see #363)
• Do not generate a negative option (--no-no-foo) for already negative boolean options (--no-foo)
• Improve compatibility of Thor::CoreExt::HashWithIndifferentAccess with Ruby standard library Hash
• Allow specifying a custom binding for template evaluation (e.g. #key? and #fetch)
• Fix support for subcommand-specific "help"s
• Use a string buffer when handling ERB for Ruby 2.3 compatibility
• Update dependencies

0.19.1, release 2014-03-24

• Fix say non-String break regression

0.19.0, release 2014-03-22

• Add support for a default to #ask
• Avoid @​namespace not initialized warning
• Avoid private attribute? warning
• Fix initializing with unknown options
• Loosen required_rubygems_version for compatibility with Ubuntu 10.04

... (truncated)

Commits

• 0887bc8 Prepare to 0.20.3
• 8c1fae2 Merge pull request #637 from y-yagi/add_care_of_old_did_you_mean
• 846b794 Add care about old version of did_you_mean
• 7d08952 Prepare to 0.20.2 release
• 43042c5 Merge pull request #636 from y-yagi/fixes_build
• 5a1b29a Remove the globally installed gem by rvm
• be29afe Run command with bundle exec
• 36c3646 Make sure did_you_mean feature works when the gem is available
• f9f7488 Prepare to 0.20.1 release
• b51916c Merge pull request #630 from kddeisz/did-you-mean
• Additional commits viewable in compare view

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