Add tee method to Query.

Author: jg-rp

jsonpath/fluent_api.py

@@ -123,3 +123,10 @@ def last(self) -> Optional[JSONPathMatch]:
             return next(iter(self.tail(1)))
         except StopIteration:
             return None
+
+    def tee(self, n: int = 2) -> Tuple[Query, ...]:
+        """Return _n_ independent queries by teeing this query's match iterable.
+
+        It is not safe to use a `Query` instance after calling `tee()`.
+        """
+        return tuple(Query(it) for it in itertools.tee(self._it, n))