Relaxed the restrictions for dotenv. We previously had it locked in at v0.8.0 because our env
files were breaking after v0.9.0, but I have tested it against our production environment
files and it is working well.

We made modifications to the most recent version of dotenv to support overloading environment
variables so that we could achieve zero-downtime deployments in situations where environment
variable values had changed.
Merge pull request #4 from amaabca/relax-dotenv-restrictions

Relaxed the restrictions for dotenv.