impl OVERVIEW: Add a dependency to the package manifest USAGE: swift package add [--branch <branch>] [--from-version <from-version>] [--exact-version <exact-version>] [--revision <revision>] <url> ARGUMENTS: <url> The URL or directory of the package to add OPTIONS: --branch <branch> The branch to depend on --from-version <from-version> The minimum version requirement --exact-version <exact-version> The exact version requirement --revision <revision> A specific revision requirement --version Show the version. -h, -help, --help Show help information.