📦 Update core devDependencies (minor)

[renovate-bot]

This PR contains the following updates:

Package	Update	Type	Change	Package file
@chiragrupani/karma-chromium-edge-launcher	minor	devDependencies	2.0.0 -> 2.1.0	package.json
commander	minor	devDependencies	6.1.0 -> 6.2.0	package.json
jest-silent-reporter	minor	devDependencies	0.2.1 -> 0.3.0	package.json

How to resolve breaking changes

This PR may introduce breaking changes that require manual intervention. In such cases, you will need to check out this branch, fix the cause of the breakage, and commit the fix to ensure a green Travis build. To check out and update this PR, follow the steps below:

# Check out the PR branch (these steps are from GitHub)
git checkout -b renovate-bot-renovate/core-devdependencies master
git pull https://github.com/renovate-bot/amphtml.git renovate/core-devdependencies

# Directly make fixes and commit them
gulp lint --fix # For lint errors in JS files
gulp prettify --fix # For prettier errors in non-JS files
# Edit source code in case of new compiler warnings / errors

# Push the changes to the branch
git push git@github.com:renovate-bot/amphtml.git renovate-bot-renovate/core-devdependencies:renovate/core-devdependencies

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Release Notes

ChiragRupani/karma-chromiumedge-launcher

v2.1.0

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Changes:

• 62ba6a5 Added Support for Linux OS

This list of changes was auto generated.

tj/commander.js

v6.2.0

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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

rickhanlonii/jest-silent-reporter

v0.3.0

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