link to Proc::Async

Author: gfldex

doc/Type/IO.pod6

@@ -325,7 +325,7 @@ To capture output you can use the C<:out> argument:
     my $proc = run 'echo', 'Perl 6 is Great!', :out;
     say $proc.out.get; # OUTPUT: Perl 6 is Great!
 
-See L<Proc|/type/Proc> for more details.
+See L<Proc|/type/Proc> and L<Proc::Async|/type/Proc::Async> for more details.
 
 =head2 sub shell
 

doc/Type/Proc.pod6

@@ -32,6 +32,8 @@ to C<True>, which will make the pipe available via C<.in> method on the C<Proc>:
     # OUTPUT: «1  Hello,␤
     #          2  world!␤»
 
+Use L<Proc::Async|/type/Proc::Async> for non-blocking operations.
+
 =head1 Methods
 
 =head2 method new