remove shebangs, add strictures to all tests

diff --git a/t/load_plugins.t b/t/load_plugins.t
index e8b26df..abed39f 100755 (executable)
--- a/t/load_plugins.t
+++ b/t/load_plugins.t
@@ -1,4 +1,5 @@
-#!/usr/bin/env perl
+use strict;
+use warnings;
 
 use FindBin qw($Bin);
 use lib "$Bin/../t/lib";