Adding functional test of database integration.

Since the project is not functional still I made the changes
needed in database in order of it to work directly over the
creation migration.

db_tests/00002-developer-dao.t

@@ -0,0 +1,43 @@
+#!/usr/bin/env perl
+
+use v5.30.0;
+
+use strict;
+use warnings;
+
+use Test::Most tests => 2;
+
+use DateTime;
+
+use Peace;
+use Peace::DB;
+use Peace::Model::Developer;
+use Peace::DAO::Developer;
+
+{
+    ## GIVEN
+    my $current_date = DateTime->now;
+    my $peace        = Peace->new;
+    my $home         = $ENV{HOME};
+    my $config =
+      $peace->plugin(
+        JSONConfig => { file => "$home/.config/peace/peace.conf" } );
+    my $dbh           = Peace::DB->dbh( config => $config );
+    my $secret_bcrypt = 'hola';
+    my $developer     = Peace::Model::Developer->new(
+        name          => 'Larry',
+        surname       => 'Wall',
+        email         => 'larry@perl.org',
+        country       => 'US',
+        verified      => 0,
+        secret_bcrypt => $secret_bcrypt
+    );
+    my $developer_dao = Peace::DAO::Developer->new( dbh => $dbh );
+
+    ## WHEN
+    $developer_dao->create( developer => $developer );
+
+    ## THEN
+    ok $developer->uuid,                          'Generated uuid.';
+    ok $developer->date_creation > $current_date, 'The date is recent.';
+}

lib/Peace/DB.pm

@@ -31,7 +31,7 @@ my @migrations = (
         name TEXT NOT NULL,
         surname TEXT NOT NULL,
         email TEXT NOT NULL,
-        stripe_id TEXT NOT NULL,
+        stripe_id TEXT,
         country TEXT NOT NULL,
         verified BOOL DEFAULT false,
         PRIMARY KEY (uuid)