improve composer.json and travis tests

[Tobion]

• make dependencies explicit
• remove compatibility with unmaintained symfony versions
• define branch alias
• remove bin config as the binaries from this package are only proxies and do not need to be exposed in other apps
• not installing symfony/symfony in tests but using Add SYMFONY_REQUIRE env var + disable recipes when flex is not in the root composer.json symfony/flex#409 (comment)
• testing with php 7.4
• fix optional event dispatcher. the event class was instantiated in the consumer/producer even if no dispatcher was injected. since the event class extends symfony event (which class still needs to be fixed for SF 5.0), the event dispatcher component was required to be installed even if not used.
• fixed test for M6WebAmqpExtension with symfony 4+ as the service are private the tested service gets removed. instead of compiling the container, it should just call load on the extension like https://github.com/FriendsOfSymfony/FOSUserBundle/blob/a9e71b6e7b61e7f39ba77436ba3e9af954450c4b/Tests/DependencyInjection/FOSUserExtensionTest.php#L112-L115
• add gitattributes based on Add Git-Attributes file #52
• fix missing spaceless tag in twig 3 (replaces Fix spaceless in amqp.html.twig for Twig 3 #55)
• it's not compatible with SF 5 yet (DataCollector does not work and base SF event does not exist), see attempt https://github.com/M6Web/AmqpBundle/pull/56/files. but it's not possible to support symfony 3, 4 and 5 at the same time (see [HttpKernel][DataCollectorInterface] Ease compatibility symfony/symfony#34230 (comment)). so I suggest to merge this now. and the next step could be to remove support for sf 3 and add support for sf 5.

[Oliboy50]

👋 thanks for the PR

LGTM

TODO: fix test for M6WebAmqpExtension with symfony 4+ as the service are private the tested service gets removed

indeed 👍
fact is that we're trying to move from atoum to phpunit (since Symfony is "recommending" the use of phpunit in its ecosystem), so maybe we could also use phpunit in this project too (don't know if it could help)

anyway, the Travis build shows that php7.0 and php7.1 are green, so I think this PR doesn't break anything

[Tobion]

@Oliboy50 this is ready. tests pass. see also my last point in the original description. you could merge this and release it as a new patch release. then the next step would be to support SF 5.

[Oliboy50]

thank you again 👏

i'm still not convinced about the .gitattributes file, but I think it won't hurt anyway 👌

I'll let (at least) one of my colleagues approve, merge and release your PR
(the M6Web review policy requires at least 2 approvals before merging)

[b-viguier]

Really nice 👏 👍
Thanks a lot

[b-viguier]

By curiosity, in which case is it interesting to prevent the export of these files? 🤔
Is it to provide lighter composer package? If so, what about src/AmqpBundle/Tests/?
Just wondering 😄

[Oliboy50]

Is it to provide lighter composer package?

indeed :D

#52 (comment)

[lnahiro]

release v3.1.2