v1.1.2

The initial definition of the \kwfont command is normally \fontseries{b}\selectfont, though this won't work if the font you're using doesn't have non-extended bold, such as if you're using beamer with the default font theme. This version adds a check that redefines \kwfont to \bfseries in such cases (provided, because of the implementation, that \fontseries{b}\selectfont has not been used earlier in the document, suppressing further font warnings).