Update dependencies

Signed-off-by: Jeffrey H. Johnson <trnsz@pobox.com>

Merge pull request #189 from johnsonjh/renovate/github.com-urfave-cli-2.x

Update module github.com/urfave/cli to v2

Update module github.com/urfave/cli to v2

Merge pull request #188 from johnsonjh/renovate/github.com-johnsonjh-gfsmux-digest

Update github.com/johnsonjh/gfsmux digest to a3dc217

Update github.com/johnsonjh/gfsmux digest to a3dc217

Merge pull request #187 from johnsonjh/renovate/github.com-urfave-cli-2.x

Update module github.com/urfave/cli to v2

Update module github.com/urfave/cli to v2

Merge pull request #186 from johnsonjh/renovate/github.com-urfave-cli-v2-2.x

Update module github.com/urfave/cli/v2 to v2.27.5

Update module github.com/urfave/cli/v2 to v2.27.5

Merge pull request #185 from johnsonjh/renovate/github.com-urfave-cli-2.x

Update module github.com/urfave/cli to v2

Update module github.com/urfave/cli to v2

Merge pull request #184 from johnsonjh/renovate/github.com-johnsonjh-gfsmux-digest

Update github.com/johnsonjh/gfsmux digest to 8c02d42

Update github.com/johnsonjh/gfsmux digest to 8c02d42

Merge pull request #183 from johnsonjh/renovate/github.com-urfave-cli-2.x

Update module github.com/urfave/cli to v2

Update module github.com/urfave/cli to v2

Merge pull request #182 from johnsonjh/renovate/github.com-johnsonjh-gfsmux-digest

Update github.com/johnsonjh/gfsmux digest to 52d0016

Update github.com/johnsonjh/gfsmux digest to 52d0016

Merge pull request #181 from johnsonjh/renovate/github.com-urfave-cli-2.x

Update module github.com/urfave/cli to v2

Update module github.com/urfave/cli to v2

Merge pull request #180 from johnsonjh/renovate/github.com-xtaci-tcpraw-1.x

Update module github.com/xtaci/tcpraw to v1.2.31