--version does not actually print the version

[galdor]

# proot --version
 _____ _____              ___
|  __ \  __ \_____  _____|   |_
|   __/     /  _  \/  _  \    _|
|__|  |__|__\_____/\_____/\____| -

built-in accelerators: process_vm = yes, seccomp_filter = yes

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It is infortunate since it makes it difficult to check which version one is running.