`current_version` doesn't check that global version is installed

[0xalpharush]

solc-select/solc_select/solc_select.py

Lines 50 to 62 in 7b493c6

	if version not in installed_versions():
	raise argparse.ArgumentTypeError(
	f"Version '{version}' not installed (set by {source}). Run `solc-select install {version}`."
	)
	else:
	source = SOLC_SELECT_DIR.joinpath("global-version")
	if Path.is_file(source):
	with open(source, encoding="utf-8") as f:
	version = f.read()
	else:
	raise argparse.ArgumentTypeError(
	"No solc version set. Run `solc-select use VERSION` or set SOLC_VERSION environment variable."
	)

This is an issue if you delete the artifact but leave the version set