Add CI, depend on newest Braket.jl and get doc build working

[kshyatt-aws]

Issue #, if available:

Description of changes: Add a CI.yml that runs the unit tests and doctests

Testing done: CI passes

Merge Checklist

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• I have read the CONTRIBUTING doc
• I used the commit message format described in CONTRIBUTING
• I have updated any necessary documentation, including READMEs and API docs (if appropriate)

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• I have added tests that prove my fix is effective or that my feature works (if appropriate)
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[kshyatt-aws]

Looks like CI is failing due to coverage being unable to POST

[AbeCoull]

Looks like CI is failing due to coverage being unable to POST

Have you already added the repo to Coveralls @kshyatt-aws ? I was having trouble finding a reference to it.

[kshyatt-aws]

Not yet, I'll try to do so now

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