bump stdlib version requirement to 2.0.0
bump stdlib version requirement to 2.0.0

1.0.0 works fine but we're penalized for having 1.0.0 by puppet forge's quality
score:

""" Contains default stdlib dependency."""

1.0.0, 1.1.0, and 2.0.0 were released the same day, someone renamed a function
and released 1.1.0 the same day as 1.0.0 but then realized that it is was a
backwards incompatible change, renamed the function again, and bumped the
version number to 2.0.0

https://github.com/puppetlabs/puppetlabs-stdlib/blob/master/CHANGELOG.md#2011-08-04-puppet-labs-supportpuppetlabscom---200

nexcess/puppet-ksplice,nexcess/puppet-ksplice