fix number of tests by counting array

Author: stmuk

t/000-check-dependencies.t

@@ -3,8 +3,6 @@ use v6;
 use lib 'lib';
 use Test;
 
-plan 6;
-
 my @dependencies = qw{
     URI
     Pod::To::HTML
@@ -15,6 +13,8 @@ my @dependencies = qw{
     HTTP::Easy
 };
 
+plan @dependencies.elems;
+
 for @dependencies -> $dep {
     use-ok $dep, "$dep able to be use-d ok";
 }