v0.5.0 - finally jupyter support!

This release:

• adds .pyw and jupyter notebook support
• forces default file encoding to utf-8
• bumps python support versions
• migrates packaging system to poetry
• increased test coverage

Huge thanks to "my" team for all of their work in this release, this was mostly their code:
@fredgrub
@mateuslatrova
@willianrocha
@daherati
@Fernando-crz
@rafael-om