Document that Type::Tiny "coercion" attribute accepts arrayref to be passed to add_type_coercions

[djerius]

Version 2.00400.

Peering at the code, it looks like

my $type = Type::Tiny->new( ..., coercion => [ $type, $coderef ...] )

is accepted, and is equivalent to

my $type = Type::Tiny->new( ...);
$type->add_type_coercions( $type, $coderef, ... );

If this is intended as part of the API, it'd be great to have it documented as such.

Thanks!

Diab