Document Parameter.coerce_type

Author: lizmat

doc/Type/Parameter.pod6

@@ -64,6 +64,10 @@ Also, C<|> will bind to all remaining arguments and make new C<Capture> if neede
 Returns the L<nominal type constraint|/type/Signature#Type_constraints> of
 the parameter.
 
+=head2 method coerce_type
+
+Returns the L<coercion type|/syntax/Coercion%20type> of the parameter.
+
 =head2 method constraints
 
 Returns L<additional constraints|/type/Signature#Type_constraints> on the