add tests for array serialization

spec/postgres/dao.spec.js

+if(typeof require === 'function') {
+  const buster  = require("buster")
+      , Helpers = require('../buster-helpers')
+      , dialect = Helpers.getTestDialect()
+}
+
+buster.spec.expose()
+
+if (dialect.match(/^postgres/)) {
+  describe('[POSTGRES] DAO', function() {
+    before(function(done) {
+      var self = this
+      console.log("to init");
+      Helpers.initTests({
+        dialect: dialect,
+        beforeComplete: function(sequelize, DataTypes) {
+          self.sequelize = sequelize
+
+          self.User = sequelize.define('User', {
+            username: DataTypes.STRING,
+            email: {type: 'text[]'}
+          })
+        },
+        onComplete: function() {
+          self.User.sync({ force: true }).success(done)
+        }
+      })
+    })
+
+    describe('model', function() {
+      it("create handles array correctly", function(done) {
+        var self = this
+
+        this.User
+          .create({ username: 'user', email: ['foo@bar.com', 'bar@baz.com'] })
+          .success(function(oldUser) {
+            expect(oldUser.email).toEqual(['foo@bar.com', 'bar@baz.com']);
+            done();
+          })
+          .error(function(err) {
+            console.log(err)
+          })
+      })
+    })
+  })
+}