Specify module version ranges in Pinto

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Tilted at [?] $4,096
Campaign Description

Adding support for precise version specification allows you to quickly construct a private repository with specific versions of your dependencies.  You can then use this repository to construct an environment that precisely matches what you have now.  This makes it easy to move to new perls or new operating systems, or to spin up new machines in the cloud with the exact same modules that you use now.