Remove extraneous dependency on jupyter_contrib_nbextensions. Add traitlets, notebook, jupyter_core, and nbformat as explicit dependencies; previously they were treated as transitive dependencies even though they are actually direct dependencies. (Issue #68)
Explicitly set all input and output file encodings to UTF-8, which fixes a bug with HTML exports on Windows with nbconvert v6.0. This version removes the version ceiling on <6.
This is not expected to cause any backwards compatibility issues. However, in the very unlikely instance that your jupyter_notebook_config.py file or your nbautoexport.json config file is Windows-1252-encoded and contains non-ASCII characters, you will need to convert them to UTF-8. (Issue #57, PR #61)