Publish 0.7.0 to PyPI

[mpkocher]

Currently, 0.6.0 is on PyPI.

Without manually building from master, I am getting KeyError (e.g., KeyError: 'Page.documentOpened') when using 0.6.0 from PyPI.

https://travis-ci.com/github/HyperionGray/trio-chrome-devtools-protocol/builds/160400374

I'm not very familiar with poetry, but I suspect you need to rerun poetry update when a dependency changes versions (e.g., chrome-devtools-protocol = "^0.4.0"). This will update the poetry.lock file to a coherent state.

Fixing the CI issues and publishing trio-chome-devtools-protocol with ^0.4.0 would be helpful for installing from PyPI.