Prevent weasel from undoing the enable-console-print

Currently, when there's a browser REPL available, the `(enable-console-print!)` is immediately undone when the page loads.

Weasel supports this scenario. See: https://github.com/tomjakubowski/weasel/blob/master/src/cljs/weasel/repl.cljs#L50

With this change, it logs output to the console and to the REPL.