Specific min perl version in the code

Changes

@@ -3,6 +3,7 @@ Revision history for Perl module TestRail::API
 0.010 2014-12-?? TEODESIAN
     - Dist name was being set to TestRail::API instead of TestRail-API
     - Reformatted this file as per CPAN::Changes::Spec
+    - Added "use 5.010" to the module, to match min perl in metadata
 
 0.009 2014-11-28 TEODESIAN
     - Oops, forgot my Test deps

lib/TestRail/API.pm

@@ -1,6 +1,6 @@
 package TestRail::API;
 {
-    $TestRail::API::VERSION = '0.009';
+    $TestRail::API::VERSION = '0.010';
 }
 
 =head1 NAME
@@ -21,6 +21,7 @@ It is by no means exhaustively implementing every TestRail API function.
 =cut
 
 
+use 5.010;
 use strict;
 use warnings;
 use Carp;