Similarly to the alg_flag (which can be set by text), the ver_flag
is able to select the WPA version which will be sent to the Wi-Fi
driver through the `IW_AUTH_WPA_VERSION` command. A new bit field
(IW_AUTH_WPA_VERSION_WPA3) was created to indicate WPA3 is set.
It's up to the arch's Wi-Fi driver to implement handling of this
new bit field and config the underlying driver to handle WPA3 on
AP and/or STA mode.
This implementation doesn't interfere with commonly used commands.
`wapi psk wlan0 mypasswd 3` still selects CCMP algorithm and WPA2
and is equivalent to `wapi psk wlan0 mypasswd 3 WPA_VER_2`.
One can use `wapi psk wlan0 mypasswd 3 WPA_VER_3` to set WPA3.
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