Local modules support with recent r10k

[pegasd]

A little bit of background: we use a very old forked version of r10k which did not have local module support at the time.
It was implement in our fork (along with some other patches) and a local module would look like this in Puppetfile:

mod 'my_module', :local

Later on, it was implemented in the upstream version, but the syntax is a little different:

mod 'my_module', local: true

# or (essentially the same thing, but with older Ruby syntax)

mod 'my_module', :local => true

At this point, this gem only recognized the first version and also writes Puppetfiles in that format.

I believe the best way to move forward is to first start supporting both formats while reading, but keep on writing Puppetfile in the old format.
Then release a major version that will start writing Puppetfile in a new format (and maybe the old format as a toggle feature).

[pegasd]

Version 0.10.0 was released with support for reading both formats of local modules. It still writes Puppetfile in legacy format.

There will no longer be any 0.* releases, bugfixes only.