Proper place for $VERSION

cpanm fails to install LWP::Protocol::socks as dependency because it can't find module version. This is because for now version specified inside LWP::Protocol::http::socks package. But it tries to find it inside LWP::Protocol::socks package.
And log looks like this:
```
Fetching http://www.cpan.org/authors/id/S/SC/SCR/LWP-Protocol-socks-1.7.tar.gz ... OK
Configuring LWP-Protocol-socks-1.7 ... OK
Building and testing LWP-Protocol-socks-1.7 ... OK
Successfully installed LWP-Protocol-socks-1.7
! Installing the dependencies failed: Missing version info for module 'LWP::Protocol::socks'
! Bailing out the installation for proxyhunter-0.01.
```