Don't inherit from Exporter anymore

This might break some arcane usages like

HTTP::Status->import_to_level()

that weren't documented usage anyway

Author: Max Maischein

lib/HTTP/Headers/Util.pm

@@ -5,7 +5,7 @@ use warnings;
 
 our $VERSION = '6.30';
 
-use base 'Exporter';
+use Exporter 5.57 'import';
 
 our @EXPORT_OK=qw(split_header_words _split_header_words join_header_words);
 

lib/HTTP/Status.pm

@@ -5,9 +5,9 @@ use warnings;
 
 our $VERSION = '6.30';
 
+use Exporter 5.57 'import';
 require 5.002;   # because we use prototypes
 
-use base 'Exporter';
 our @EXPORT = qw(is_info is_success is_redirect is_error status_message);
 our @EXPORT_OK = qw(is_client_error is_server_error is_cacheable_by_default);