Bump dependencies versions

[mikebohdan]

• updated all dependencies to the latest versions
• added a pre-init-spec for the :duct.server.http/aleph docs
• fixed existing tests according to the spec
• added new tests

[atomist]

Commit messages of this repository should follow the seven rules of a great Git commit message, as mentioned in the project's contributing guidelines. It looks like there's a few issues with the commit messages in this pull request:

• The commit message should be written in the imperative mood, like a command, so 'Add' instead of 'Added'.
• The commit message body has a line over 72 characters.