PCA-43: 🧱 Upgrade to PHP 8 and Symfony HTTP client

Drop Guzzle in favor of Symfony 6 client

1.0.0-alpha7 - Add LanguageStatus API method

• Add LanguageStatus API method

1.0.0-alpha6 update php cs fixer dependency and change crowdin domain

• update php cs fixer dependency thx to @mickaelandrieu
• change crowdin domain thx to @lologhi

1.0.0-alpha5 Improve api/upload and allow json content for responses

• add support for the "branch" parameter from crowdin api/upload thx to @jtabet 🎉
• improve api/upload to allow to push multiple languages in one call thx to @jtabet 🎉
• allow to pass extra parameters as "json" to get a json content as response (xml by default) thx to @jtabet 🎉

1.0.0-alpha4 fix Api/Download + https by default

• Switch to HTTPS by default thanks to @lologhi 🎉
• Fix Api/Download issue introduced by using GuzzleHttp thanks to @lologhi 🎉

1.0.0-alpha3 now using GuzzleHttp

• switch to GuzzleHttp thanks to @lologhi 🎉
• fix UploadTranslation inconsistency
• improve (a bit) the documentation

1.0.0-alpha2

• Add Change Directory action
• Fix coding standard

>= PHP 5.5

• bump php version >= 5.5
• bump phpspec 2.5
• use PSR4, change namespace from Crowdin to Akeneo/Crowdin
• fix php7 issue in specs

Last PHP 5.3 compatible release

Merge pull request #28 from akeneo/test-travis

Fix PHP 5.3 compatibility

0.2.0: Merge pull request #19 from akeneo/bugfix/export

Fixed export service endpoint