Multiple test_args when checking for installed crate

[roblabla]

Features Description
To test if cargo-travis is installed, the user is supposed to run cargo doc-upload --help. This doesn't work with cargo-make however, because it is impossible to pass multiple arguments (test_arg is passed as a single argument).

Simply using cargo-doc-upload --help wouldn't work because it exits with an error, leading to cargo-make thinking it should update it.

Describe the solution you'd like
Add a new key to install_crate, test_args, an array of arguments to pass to the binary. Example:
install_crate = { crate_name = "cargo-travis", binary = "cargo", test_args = ["doc-upload", "--help" }

Code Sample

[tasks.deploy-doc]
workspace = false
install_crate = { crate_name = "cargo-travis", binary = "cargo", test_arg = "doc-upload --help" }
install_crate_args = ["--git", "https://github.com/roblabla/cargo-travis", "--rev", "doc-upload-target"]
description = "Upload this project's documentation on github pages. Should only run on CI."
command = "cargo"
args = ["doc-upload", "--clobber-index"]

This will always cause cargo-make to reinstall cargo-travis.

[sagiegurari]

thanks, will check it out

[sagiegurari]

your PR is now officially released. thanks a lot!!!