Allow send impl to add an event to the internal event queue

Per 6.2.[4-5] If the send impl doesn't support the specified target(expr) or type(expr), " the Processor MUST place the error error.execution on the internal event queue." Exposing $raise to the send impl allow for this

Also stumbled upon SCXML.js:450 while inspecting the code. It doesn't seem to matter by default since both transition selectors resolve to scxml-dynamic-name-match-transition-selector.