Update dependency commander to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
commander	dependencies	major	~3.0.0 -> ~4.1.0

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Release Notes

tj/commander.js

v4.1.0

Compare Source

Added

• two routines to change how option values are handled, and eliminate name clashes with command properties ([#​933][#​1102])
  • see storeOptionsAsProperties and passCommandToAction in README
• .parseAsync to use instead of .parse if supply async action handlers ([#​806][#​1118])

Fixed

• Remove trailing blanks from wrapped help text ([#​1096])

Changed

• update dependencies
• extend security coverage for Commander 2.x to 2020-02-03
• improvements to README
• improvements to TypeScript definition documentation
• move old versions out of main CHANGELOG
• removed explicit use of ts-node in tests

v4.0.1

Compare Source

Fixed

• display help when requested, even if there are missing required options ([#​1091])

v4.0.0

Compare Source

Added

• automatically wrap and indent help descriptions for options and commands ([#​1051])
• .exitOverride() allows override of calls to process.exit for additional error handling and to keep program running ([#​1040])
• support for declaring required options with .requiredOptions() ([#​1071])
• GitHub Actions support ([#​1027])
• translation links in README

Changed

• dev: switch tests from Sinon+Should to Jest with major rewrite of tests ([#​1035])
• call default subcommand even when there are unknown options ([#​1047])
• Breaking Commander is only officially supported on Node 8 and above, and requires Node 6 ([#​1053])

Fixed

• Breaking keep command object out of program.args when action handler called ([#​1048])
  • also, action handler now passed array of unknown arguments
• complain about unknown options when program argument supplied and action handler ([#​1049])
  • this changes parameters to command:* event to include unknown arguments
• removed deprecated customFds option from call to child_process.spawn ([#​1052])
• rework TypeScript declarations to bring all types into imported namespace ([#​1081])

Migration Tips

Testing for no arguments

If you were previously using code like:

if (!program.args.length) ...

a partial replacement is:

if (program.rawArgs.length < 3) ...

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[codecov]

Codecov Report

Merging #220 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master   #220   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           2      2           
  Lines         131    131           
=====================================
  Hits          131    131

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