Elvish hook outdated

[vanor89]

Describe the bug
Elvish hook is outdated. Throws warnings

To Reproduce
Install latest version of Elvish as your shell
Install direnv
Hook elvish.

Expected behavior
No errors

Environment

• OS: macOS Monterrey
• Shell: Elvish
• Direnv version latest

Additional context
Replace hook with:

set @edit:before-readline = $@edit:before-readline {
        try {
                var m = [("/usr/local/bin/direnv" export elvish | from-json)]
                if (> (count $m) 0) {
                        set m = (all $m)
                        keys $m | each {|k|
                                if $m[$k] {
                                        set-env $k $m[$k]
                                } else {
                                        unset-env $k
                                }
                        }
                }
        } except e {
                echo $e
        }
}

[zimbatm]

can you try the latest master now that #896 has been merged in?