Add support of int and timestamp types (#30)

Author: antevgen

src/Console/GenerateFactoryCommand.php

@@ -396,10 +396,12 @@ protected function mapByType(string $field, bool $nullable = false): ?string
             'text' => $this->fakerPrefix('text', $nullable),
             'date' => $this->fakerPrefix('date()', $nullable),
             'time' => $this->fakerPrefix('time()', $nullable),
+            'timestamp' => $this->fakerPrefix('datetime()', $nullable),
             'guid' => $this->fakerPrefix('uuid', $nullable),
             'datetimetz' => $this->fakerPrefix('dateTime()', $nullable),
             'datetime' => $this->fakerPrefix('dateTime()', $nullable),
             'integer' => $this->fakerPrefix('randomNumber()', $nullable),
+            'int' => $this->fakerPrefix('randomNumber()', $nullable),
             'bigint' => $this->fakerPrefix('randomNumber()', $nullable),
             'smallint' => $this->fakerPrefix('randomNumber()', $nullable),
             'tinyint' => $this->fakerPrefix('randomNumber(1)', $nullable),