snapcraft-parser -v prints devel

[Leo Arias]

When I run snapcraft-parser -v I get:

devel

The version number should be printed instead.

[Simon Quigley (tsimonq2)]

This is the current function that completes this:

def _get_version():
    try:
        return pkg_resources.require('snapcraft')[0].version
    except pkg_resources.DistributionNotFound:
        return 'devel'

We need a better solution.