Fix issues with deprecated values in apt::source

[b4ldr]

Fix issues with deprecated values

Warning: Scope(Apt::Source[gitlab_official]): $key_source is deprecated and will be removed in the next major release, please use $key => { 'source' => https://packages.gitlab.com/gpg.key } instead.
Warning: Scope(Apt::Source[knot_official]): $include_src is deprecated and will be removed in the next major release, please use $include => { 'src' => true } instead
Warning: Scope(Apt::Source[knot_official]): $include_deb is deprecated and will be removed in the next major release, please use $include => { 'deb' => true } instead

[tobru]

Thanks for the PR. Could you please make sure that the tests aren't failing. There seem to be a missing comma.

[b4ldr]

Tests are passing locally had to bump the dependency on apt to 2.0.0. however travis hasn't run its test, not sure if its overloaded or needs kicking some how