Michał Piotrowski

Enable pytest coverage in CI for every new PR

`warning @scramjet/[email protected]: The engine "python3" appears to be invalid. ` engine is keyword in nodejs, but we use also engine keyword for python sequences to run proper runner, however it...

Current way of packaging Python Sequences is described [here](https://github.com/scramjetorg/scramjet-main-page/blob/develop/packages/docs-domain/src/docs/platform/python.md). This is strongly associated with Node.js run environment. We want to provide for users convenient, pythonic way of creating and packaging...