test(typescript-estree): update @babel/parser to 7.15.4

[sosukesuzuki]

This is still draft because blocked by babel/babel#13731.

Updates @babel/parser to latest!

[typescript-eslint]

Thanks for the PR, @sosukesuzuki!

typescript-eslint is a 100% community driven project, and we are incredibly grateful that you are contributing to that community.

The core maintainers work on this in their personal time, so please understand that it may not be possible for them to review your work immediately.

Thanks again!

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CI ran the following commands for commit d5a61d6. Click to see the status, the terminal output, and the build insights.

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Status	Command
	nx test @typescript-eslint/eslint-plugin-internal
	nx test @typescript-eslint/eslint-plugin-tslint
	nx test @typescript-eslint/eslint-plugin
	nx test @typescript-eslint/eslint-plugin-tslint
	nx test @typescript-eslint/eslint-plugin
	nx test @typescript-eslint/eslint-plugin-tslint
	nx test @typescript-eslint/eslint-plugin
	nx test @typescript-eslint/parser
	nx test @typescript-eslint/experimental-utils
	nx test @typescript-eslint/parser
	nx test @typescript-eslint/parser
	nx run-many --target=typecheck --all --parallel
	nx test @typescript-eslint/scope-manager
	nx test @typescript-eslint/experimental-utils
	nx test @typescript-eslint/experimental-utils
	nx test @typescript-eslint/scope-manager
	nx test @typescript-eslint/scope-manager
	nx test @typescript-eslint/visitor-keys
	nx test @typescript-eslint/typescript-estree
	nx test @typescript-eslint/visitor-keys

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[bradzacher]

thanks!