Share strict to the PG safe zone.

Versions of Perl prior to 5.34 need this.  Otherwise warnings are issue
by the `BEGIN { strict->import }` approach now used in place of the old
`BEGIN { be_strict() }` approach.

Author: drgrice1

conf/defaults.config

@@ -1276,6 +1276,7 @@ ${pg}{modules} = [
 	[qw(Rserve Class::Tiny IO::Handle)],
 	[qw(DragNDrop)],
 	[qw(Types::Serialiser)],
+	[qw(strict)],
 ];
 
 ##### Problem creation defaults