Utils::invariant issue is back on v0.15

[jazithedev]

Q	A
Bug report?	yes
Feature request?	no
BC Break report?	no
RFC?	no
Version/Branch	0.15

As v0.15 has the latest webonyx now, the GraphQL\Utils::invariant(...) issue came back. Can you please apply the #994 onto v0.15 version of GraphQLBundle?

[mcg-web]

This change is part of a none released version. v0.15 supports until last stable version v14.11.6 right now. v1.0-dev (master branch) supports this change, we are waiting for the release of webonyx/graphql-php to release it too.

[RuslanZavacky]

Looks like graphq-php released it yesterday :) can this bundle be released now? Thank you!

[jazithedev]

Hello guys 👋. Just bumping the thread. Can we have the fix on the stable version?