deps: tools: add marwan-at-work/mod

[Kamil Samigullin]

Motivation: it allows to update a major version of a dependency.

$  mod upgrade --mod-name=github.com/google/go-github/v44
# update it to v45

//go:build tools

package tools

import (
	_ "github.com/marwan-at-work/mod/cmd/mod"
)

//go:generate go install github.com/marwan-at-work/mod/cmd/mod

[Kamil Samigullin]

moved to kamilsk/dotfiles/issues/366