fix: do not convert functions where first parameter is this
#64
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Description (What)
Fixes #63 by preventing conversion of functions when the first parameter is
thisJustification (Why)
Some custom userland functions that are ultimately passed back into a library are sometimes required to be instance methods with
thisdeclared for correct argument types, regardless of whetherthisis needed by the function body. One such example is fastify'sapp.setErrorHandler(fn)(5.1.0)How Can This Be Tested?
Tests were added