if you find an instance in the code examples where ASI doesn't do its job i'd happily merge in a pull request that inserts a semicolon manually https://github.com/maxogden/javascript-for-cats
No no no. Teaching people to only use a semicolon in some cases is even worse. It's far better to just tell them to use semicolons everywhere, as they should. ASI is an error-correction mechanism, after all.
i'll make you a deal: if you can find a bug caused by me not using semicolons in any of my github repos from the last year i will add a section into jsforcats about using semicolons
teaching to a broad audience means balancing the likelihood that the learner will be in over their head (too much information) with the likelihood that they will have a negative experience stemming from lack of information (bug due to missing semicolon). given javascript and its many bad parts I believe the first scenario to be much more likely than the second, especially for an introductory text.