François-Xavier de Guillebon

[PHP] Support \DateTimeImmutable

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### PR checklist - [x] Read the [contribution guidelines](https://github.com/swagger-api/swagger-codegen/blob/master/CONTRIBUTING.md). - [x] Ran the shell script under `./bin/` to update Petstore sample so that CIs can verify the change. (For instance,...

[Router] Adapt code since Symfony 4 is now required

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This PR removes compatibility with Symfony 2 in Router class. I also update the code to be more Symfony 4. Breaking change is that now the I18nLoader service is injected...

I got this error when running this command: `gh jira XXXX-ticket --transition 'Changes requested'` ``` Trace: TypeError: Cannot read property 'Changes requested' of undefined at Jira.openFieldQuestions (/app/node_modules/gh-jira/bin/jira.js:560:53) at /app/node_modules/gh-jira/bin/jira.js:629:28 at...

Fix deprecations triggered since twig 3.12.0

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| Q | A | ------------- | --- | Bug fix? | yes | New feature? | no | BC breaks? | no | Deprecations? | no | Tests pass?...

| Q | A | ------------- | --- | Bug fix? | no | New feature? | no | BC breaks? | no | Deprecations? | no | Tests pass?...