feat: show aqua version after installation

[suzuki-shunsuke]

#168

e.g.

$ aqua-installer -i /tmp/aqua
===> Downloading https://github.com/aquaproj/aqua/releases/latest/download/aqua_darwin_arm64.tar.gz ...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100 5672k  100 5672k    0     0  3954k      0  0:00:01  0:00:01 --:--:-- 13.4M
x LICENSE
x README.md
x aqua
===> Install aqua latest (darwin/arm64) to /tmp/aqua
aqua version 1.19.2 (b6d0cfcbafb9f8371fc6dfb16a225fecd4646444)

[tadayosi]

Thanks, looks awesome!