Italian translations (#374)

* Added italian language

* Bump @testing-library/react from 11.2.7 to 12.1.5 (#327)

Bumps [@testing-library/react](https://github.com/testing-library/react-testing-library) from 11.2.7 to 12.1.5.
- [Release notes](https://github.com/testing-library/react-testing-library/releases)
- [Changelog](https://github.com/testing-library/react-testing-library/blob/main/CHANGELOG.md)
- [Commits](testing-library/react-testing-library@v11.2.7...v12.1.5)

---
updated-dependencies:
- dependency-name: "@testing-library/react"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* Bump docker/build-push-action from 3 to 4 (#328)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 3 to 4.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v3...v4)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* Added italian language

* Fix

* Updated yarn.lock

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -31,6 +31,7 @@
     "ra-language-chinese": "^2.0.10",
     "ra-language-french": "^4.9.3",
     "ra-language-german": "^3.13.4",
+    "ra-language-italian": "^3.13.1",
     "react": "^17.0.0",
     "react-admin": "^3.19.12",
     "react-dom": "^17.0.2",

src/App.js

@@ -28,12 +28,14 @@ import germanMessages from "./i18n/de";
 import englishMessages from "./i18n/en";
 import frenchMessages from "./i18n/fr";
 import chineseMessages from "./i18n/zh";
+import italianMessages from "./i18n/it";
 
 // TODO: Can we use lazy loading together with browser locale?
 const messages = {
   de: germanMessages,
   en: englishMessages,
   fr: frenchMessages,
+  it: italianMessages,
   zh: chineseMessages,
 };
 const i18nProvider = polyglotI18nProvider(