Install script ignores BIN_DIR if cargo is installed

[dnebauer]

The install script method provides the following install command:

BIN_DIR=/usr/local/bin bash <(curl -sL https://raw.githubusercontent.com/denisidoro/navi/master/scripts/install)

If cargo is not installed, executing that command as an ordinary user honours the BIN_DIR variable and navi is installed to that directory.

If cargo is installed, it is used by the install script and the BIN_DIR variable is ignored: navi is installed to ~/.cargo/bin/.

OS: debian 5.10.24 (2021-03-19) x86_64
Shell: zsh 5.8
Bash: version 5.1.4

[welcome]

Thanks for opening your first issue here! In case you're facing a bug, please update navi to the latest version first. Maybe the bug is already solved! :)