support creating builds w/ images from external registries

[jranson]

This PR adds a new create-wtih-registry subcommand to the build command that accepts image, registry and auth flags (in addition to the familiar build-id and build-tag flags).

Usage:

$ hathora build create-wtih-registry --image nginx:latest # docker hub image

$ hathora build create-wtih-registry --image userspace/image:latest # docker hub image

$ hathora build create-wtih-registry --image private.com/namespace/server:latest # private registry image

$ hathora build create-wtih-registry --image namespace/server:latest --registry private.com # also works

$ hathora build create-wtih-registry --image private.com/namespace/server:latest --auth $TOKEN # with auth

$ hathora build help create-wtih-registry
NAME:
   hathora build create-wtih-registry - create a build using a docker image in an external registry

USAGE:
   hathora build create-wtih-registry [command [command options]] [arguments...]

COMMANDS:
   help, h  Shows a list of commands or help for one command

OPTIONS:
   Build:

   --auth <auth>                         optional <auth> credential for authenticating with a private registry [$HATHORA_BUILD_REGISTRY_AUTH]
   --build-id <id>, -b <id>              the <id> of the build in Hathora [$HATHORA_BUILD_ID]
   --build-tag <tag>, --bt <tag>         <tag> or external version to associate with the build [$HATHORA_BUILD_TAG]
   --image <image>, -i <image>           the docker <image> tag or url for the external image [$HATHORA_BUILD_IMAGE]
   --registry <registry>, -r <registry>  optional <registry> FQDN hosting the server image; can be in the image flag instead [$HATHORA_BUILD_REGISTRY]

   Global:

   --app-id <id>, -a <id>                     the <id> of the app in Hathora [$HATHORA_APP_ID]
   --config <path>, -c <path>                 <path> to the configuration file
   --hathora-cloud-endpoint <url>             override the default API base <url> (default: https://api.hathora.dev) [$HATHORA_CLOUD_ENDPOINT]
   --help, -h                                 show help (default: false)
   --output <format>, -o <format>             the <format> of the output. Supported values: (json, text, buildIdValue) (default: text) [$HATHORA_OUTPUT]
   --pretty                                   enable pretty output (json only) (default: true)
   --token <access-token>, -t <access-token>  <access-token> for authenticating with the API [$HATHORA_TOKEN]
   --verbose, -v                              enable verbose logging (default: false)
   --verbosity <level>                        set the logging verbosity <level> (0-3) (default: 0) [$HATHORA_VERBOSITY]

Also bumps all external dependency versions save for urfave/cli