Fix installation of dmd point releases

[wilzbach]

Seems like #200 broke the ability to download/install point releases as it tries to query for the latest build version. This just extends the ignore regex to add point releases

CC @MartinNowak

[dnadlinger]

@MartinNowak: Seems like #200 broke CircleCI on dlang/dmd, so ping.

[dnadlinger]

@andralex @CyberShadow: #200 broke CircleCI on all of dlang, so I'd suggest pulling this as a hotfix until Martin can have a look. (Don't have push access to installer.)

[andralex]

I'll pull this (for) now. Thanks.

[wilzbach]

I'll pull this (for) now. Thanks.

Thanks!. It seems that the file at https://dlang.org/install.sh is still using the old version. Does anyone know how we can update it?

[MartinNowak]

Thanks and sorry for the troubles, time to write tests for that script ;).

[MartinNowak]

The script is simply copied to dlang.org, i.e. scp install.sh install.sh.sig digitalmars.com:/usr/local/www/dlang.org/data/. We have a couple of people who can do that.
It's currently done manually b/c I'm also signing the script. Would be good to have more people in our keyring http://dlang.org/gpg_keys.html.