Update dependency commander to v6.2.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
commander	dependencies	minor	6.1.0 -> 6.2.0

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Release Notes

tj/commander.js

v6.2.0

Compare Source

Added

• added 'tsx' file extension for stand-alone executable subcommands ([#​1368])
• documented second parameter to .description() to describe command arguments ([#​1353])
• documentation of special cases with options taking varying numbers of option-arguments ([#​1332])
• documentation for terminology ([#​1361])

Fixed

• add missing TypeScript definition for `.addHelpCommand()' ([#​1375])
• removed blank line after "Arguments:" in help, to match "Options:" and "Commands:" ([#​1360])

Changed

• update dependencies

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[coveralls]

Pull Request Test Coverage Report for Build 326751980

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 325327537:	0.0%
Covered Lines:	197
Relevant Lines:	197

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💛 - Coveralls

[codecov]

Codecov Report

Merging #103 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #103   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           10        10           
  Lines          202       202           
  Branches        24        24           
=========================================
  Hits           202       202           

Flag	Coverage Δ
#unittests	100.00% <ø> (ø)

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