when using PDL functionality, PDL needs to be 2.006 or greater

Author: wchristian

META.json

@@ -56,7 +56,6 @@
             "File::Temp" : "0",
             "IO::Handle" : "0",
             "IPC::Open3" : "0",
-            "PDL" : "0",
             "Storable" : "0",
             "Test::Fatal" : "0",
             "Test::InDistDir" : "0",

lib/WebService/Plotly.pm

@@ -195,7 +195,8 @@ sub _makecall {
     my ( $json_args, $json_kwargs );
     {
         no warnings 'once';
-        local *PDL::TO_JSON = sub { $_[0]->unpdl };
+        local *PDL::TO_JSON = sub { $_[0]->unpdl }
+          if PDL->VERSION >= 2.006;
         my $convert = sub { JSON->new->utf8->convert_blessed( 1 )->canonical( 1 )->encode( $_[0] ) };
         $json_args   = $convert->( $args );
         $json_kwargs = $convert->( \%kwargs );

t/basic.t

@@ -63,7 +63,7 @@ sub run {
     }
 
   SKIP: {
-        skip "no PDL", 15 if !eval { require PDL };
+        skip "no PDL", 15 if PDL->VERSION < 2.006;
         my $url  = "https://plot.ly/~$user{un}/1";
         my $name = "plot from API (1)";
         my $box  = {
@@ -86,7 +86,7 @@ sub run {
     }
 
   SKIP: {
-        skip "no PDL", 15 if !eval { require PDL };
+        skip "no PDL", 15 if PDL->VERSION < 2.006;
         require PDL::Constants;
         require Storable;
         require PDL::IO::Storable;