:$cwd param for process spawning

Author: ugexe

lib/Type/Proc.pod

@@ -46,6 +46,7 @@ second command, you can do
             Bool :$merge = False,
             Str:D :$enc = 'UTF-8',
             Str:D $nl = "\n",
+            :$cwd = $*CWD,
             *@args
     )  returns Proc:D
 
@@ -74,9 +75,9 @@ merged in C<$proc.out>.
 
 =head2 method spawn
 
-    method spawn(Proc:D *@args ($, *@)) returns Bool:D
+    method spawn(Proc:D *@args ($, *@), :$cwd = $*CWD) returns Bool:D
 
-Runs the C<Proc> objects with the given command and argument list.
+Runs the C<Proc> objects with the given command, argument list, and working directory.
 
 =head2 method exitcode
 

lib/Type/Proc/Async.pod

@@ -114,7 +114,7 @@ the program through C<print>, C<say> and C<write>.
 
 =head2 method start
 
-    method start(Proc::Async:D:, :$scheduler = $*SCHEDULER) returns Promise:D
+    method start(Proc::Async:D:, :$scheduler = $*SCHEDULER, :$cwd = $*CWD) returns Promise:D
 
 Initiates spawning of the external program. Returns a promise that will be
 kept with a L<Proc::Status|/type/Proc::Status> object once the external