Fixes dependencies within letsencrypt states and upgrade to 1.0.0

[TimidRobot]

Description

Fixes dependencies within letsencrypt and letsencrypt.cloudflare states.

Checklist

• My pull request has a descriptive title (not a vague title like Update index.md).
• My pull request targets the master branch of the repository.
• My commit messages follow best practices.
• I added tests for the changes I made (if applicable).
• N/A I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no
  visible errors.

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[mathemancer]

I'm leaving it to @TimidRobot , since they're the expert on this one, but I'm curious about best practices for handling dependencies in a case like this. Is there a way to specify which 'dot' of release to take?

[TimidRobot]

@mathemancer The changes primarily impact SaltStack state dependencies (the changes to require and require_in). See Requisites and Other Global State Arguments.

For the Python dependencies of certbot and certbot-dns-cloudflare, the added upgrade: True means that they will be upgraded to the most recent version. A lot of people preferred pinned versions--but I think I'd rather commit to addressing problems as they arise than risk a deployment configuration that is left behind.