Fix test suite with new pretty option of the JSON serializer

With previous commits, the JSON serializer uses the pretty flag
in development environement, which happens to be the default one.

So every test get a pretty JSON, with \n and indentations, of course they don't
expect that, and fail.

Now, all these test set the env to production to avoid prettyness of the
serializer.

t/12_response/03_charset.t

@@ -9,6 +9,8 @@ use Encode;
 
 plan tests => 16;
 
+set environment => 'production';
+
 my $res = Dancer::Response->new(headers => [ 'Content-Type' => 'text/html' ], content_type => 'text/html');
 my $psgi_res = Dancer::Handler->render_response($res);
 is(@$psgi_res, 3);

t/14_serializer/04_mutable.t

@@ -13,6 +13,8 @@ BEGIN {
 
 plan tests => 17;
 
+set environment => 'production';
+
 ok(setting('serializer' => 'Mutable'), "serializer Mutable loaded");
 my $s = Dancer::Serializer->engine;
 

t/14_serializer/05_live.t

@@ -2,6 +2,9 @@ use strict;
 use warnings;
 use Test::More import => ['!pass'];
 
+use Carp;
+$Carp::Verbose = 1;
+
 BEGIN {
     use Dancer::ModuleLoader;
 
@@ -18,6 +21,7 @@ use LWP::UserAgent;
 use HTTP::Request;
 
 plan tests => 30;
+set environment => 'production';
 
 test_json();
 test_yaml();

t/14_serializer/06_serialize_response.t

@@ -15,6 +15,7 @@ my $json = JSON::encode_json($data);
     use Dancer ':syntax';
 
     set serializer => 'JSON';
+    set environment => 'production';
 
     get '/data' => sub {
         $data;

t/14_serializer/14_show_errors.t

@@ -36,6 +36,7 @@ Test::TCP::test_tcp(
         setting port => $port;
         setting access_log => 0;
         setting serializer => 'JSON';
+        set environment => 'production';
 
         get '/with_errors' => sub {
             setting show_errors => 1;

t/lib/TestSerializer.pm

@@ -5,7 +5,7 @@ use Dancer;
 setting serializer => 'JSON';
 
 get '/json' => sub {
-    to_json({foo => 'bar'}, pretty => 1);
+    to_json({foo => 'bar'}, { pretty => 1});
 };
 
 get '/' => sub {