Handle remaining issues in the pnlp-refactor-ubuntu23

[suranah]

We need to tackle a range of issues for the version upgrade refactor. This is a list of issues that needed to be addressed in the pnlp-refactor-ubuntu23:

• Fix notebook dying due to inactivity on Google Colab (ch 4, nb 6) #139
• Address DeepExplainer issue. Shap interface internals seem to have changed (ch 4, nb 10) #140
• Address Fast AI response issue. Fast AI return type seems to have changed (ch 4, nb 10) #141
• Fix notebook dying due to inactivity on Google Colab (ch 4, nb 7) #142
• Address LexNLP Library issue. Installing newer version of LexNLP give error (Ch10, nb 2) #143
• Address Autosklearn Library issue. Installing newer version of Autosklearn give error (Ch11, nb1) #144