chore(release): add update milestones script

[ShGKme]

npm run post-release:milestones

Update milestones after the release:
	1. Renames the current milestone to the release milestone (Next Release -> v1.2.3)
	2. Creates the next milestone as a replacement for the current (Next Release)
	3. Moves all open issues and PRs from the current=release milestone to the new milestone (v1.2.3 -> Next Release)
	4. Closes the current=release milestone
USAGE:
	npm run post-release:milestones
	npm run post-release:milestones -- -y --current="🪴 Next Release" --release="v1.2.3" --next="🌵 Next Release"
ARGS:
	--help - show help
	-y - skip confirmation
	--current - Optionally the current milestone to rename. Default is "🪴 Next Release".
	--release - Optionally the release version to rename the source milestone to. Default is the v + package.json version.
	--next - Optionally the new milestone to create. Default is --source, which is "🪴 Next Release".

Full flow

When almost done already