Enable OTP 2FA

- Update SchebTwoFactorBundle to version 3
- Enable Google 2fa on the bundle
- Disallow ability to use both email and google as 2fa
- Update Ocramius Proxy Manager to handle typed function & attributes (from PHP 7)
- use `$this->addFlash` shortcut instead of `$this->get('session')->getFlashBag()->add`
- update admin to be able to create/reset the 2fa

src/Wallabag/CoreBundle/Command/ShowUserCommand.php

@@ -57,7 +57,8 @@ class ShowUserCommand extends ContainerAwareCommand
             sprintf('Display name: %s', $user->getName()),
             sprintf('Creation date: %s', $user->getCreatedAt()->format('Y-m-d H:i:s')),
             sprintf('Last login: %s', null !== $user->getLastLogin() ? $user->getLastLogin()->format('Y-m-d H:i:s') : 'never'),
-            sprintf('2FA activated: %s', $user->isTwoFactorAuthentication() ? 'yes' : 'no'),
+            sprintf('2FA (email) activated: %s', $user->isEmailTwoFactor() ? 'yes' : 'no'),
+            sprintf('2FA (OTP) activated: %s', $user->isGoogleAuthenticatorEnabled() ? 'yes' : 'no'),
         ]);
     }