Allow a codegen to return a science image name

It is now possible for codegen's to specify which science image they would like the payload run on. There are also a number of smaller changes.

What's Changed

• Update python versions in tests by @ponyisi in #13
• Remove poetry.lock from this library package by @ponyisi in #14
• Update werkzeug to avoid vulnerability by @BenGalewsky in #12
• Unpin urllib3 as needed to fix security issue by @ponyisi in #16
• Allow codegens to return a science image to be used for a request by @ponyisi in #15

New Contributors

• @ponyisi made their first contribution in #13

Full Changelog: 1.1.7...1.2