minor(deps): update module github.com/alexflint/go-arg to v1.5.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
github.com/alexflint/go-arg	v1.4.3 -> v1.5.0

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Release Notes

alexflint/go-arg (github.com/alexflint/go-arg)

### [`v1.5.0`](https://togithub.com/alexflint/go-arg/releases/tag/v1.5.0): Version 1.5.0 [Compare Source](https://togithub.com/alexflint/go-arg/compare/v1.4.3...v1.5.0) - Argument structs can define Description() and Epilogue(), which are added to the usage string - Subcommands can have multiple aliases like this: ```go var args struct { Remove *struct{} `arg:"subcommand:remove|rm|r" help:"remove something from somewhere"` } ``` - Improves formatting of usage string when the placeholder tag is set to empty string - Do not handle --version when the args struct lacks a Version() function - Add StructSubcommands to Config struct

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