run experimental vulncheck analysis (experimental: under development)

Usage:
  gopls [flags] vulncheck

	WARNING: this command is experimental.

	By default, the command outputs a JSON-encoded
	golang.org/x/tools/internal/lsp/command.VulncheckResult
	message.
	Example:
	$ gopls vulncheck <packages>

  -config
    	If true, the command reads a JSON-encoded package load configuration from stdin