v1.1.0

- [#51](#51) Update to Sylius v1.4.0 ([@pamil](https://github.com/pamil))

refactor #43 Symfony 4 directory structure in test app (bartoszpietrz…

…ak1994)

This PR was merged into the 1.1-dev branch.

Discussion
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Commits
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745b3bb Symfony 4 directory structure in test app

Merge pull request #40 from bartoszpietrzak1994/fix-security-issue

Fix security issue

Merge pull request #41 from Zales0123/make-symfony-flex-comes-true

Make plugin possible to be installed with SymfonyFlex

Merge pull request #34 from bartoszpietrzak1994/add-missing-author-block

Add missing author block

Merge pull request #33 from bartoszpietrzak1994/reorder-button-label-…

…placed-in-messages-file

Reorder button label placed in messages.yml file

Make Behat great again

Merge pull request #21 from bartoszpietrzak1994/docs-update

Improved docs

Merge pull request #20 from bartoszpietrzak1994/i-want-to-be-informed…

…-when-none-of-order-items-is-in-stock

I want to be informed when none of order items is in stock

Merge pull request #11 from bartoszpietrzak1994/docs

Intallation guide