Clean up doc references to clojure.spec.* in favor of cljs.spec.*
There are a handful of docstrings that refer to the namespaces as clojure.spec.* instead of cljs.spec.* that could be cleaned up:
In the regex? predicate
The keyword in the conform docstring
The fdef docstring
These can also be cleaned up to append alpha (as is done in other docstrings).