Use duplicate named capture groups in the future

[tommy-mitchell]

https://github.com/tc39/proposal-duplicate-named-capturing-groups is stage 3 currently. When it lands in TypeScript / Node.js, it can be used in applyEnvironmentVariables to combine <quoted> and <value>:

listr-cli/src/helpers/apply-environment-variables.ts

Lines 10 to 16 in e2520fa

	* 1. /(?=[^,])/ // Skip commas
	* 2. /(?<env>[^:,]*)/ // Capture environment variable name (anything before : or ,)
	* 3. /(?: ... | ... )?/ // Search for variable value, 0-1 times
	* 4. /:["'](?<quoted>[^"']*)["']/ // First alternate: capture quoted value (after :, between "" or '')
	* 5. /:(?<value>[^,]*)/ // Second alternate: capture unquoted value (after :, anything before ,)
	*/
	const environmentVariableRegex = /(?=[^,])(?<env>[^:,]*)(?::["'](?<quoted>[^"']*)["']|:(?<value>[^,]*))?/g;