ssmenv
======
Added
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* Export the `Configuration` type which provides is used to enable access to
the API of the AWS SSM Parameter Store.
* Export the `Tag` type which provides information about AWS tags attached to a
resource.
* Add the static `Environment.listAll` method to retrieve an array of all the
path names which could be used as Environments (because they have leaf
nodes).
ssmenv-cli
==========
Changed
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* The `env:list` command now calls out to the `Environment` class rather than
getting an instance to access the AWS API directly.
Removed
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* Drop the `getDirectEnvironment` method. This function was only exported
internally.