Qtgql

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* Support for Windows.

* Breaking changes:
* `qtgql::bases::Environment`
now accepts a network layer as a shared_ptr (previously was unique_ptr).

Contributed by [ניר](https://github.com/nrbnlulu) via [PR #414](https://github.com/qtgql/qtgql/pull/414/)

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Fix a case that batch deletion won't update the UI.

Contributed by [ניר](https://github.com/nrbnlulu) via [PR #390](https://github.com/qtgql/qtgql/pull/390/)

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Fix a bug that when a list of objects is reduced (on update)
the ui won't get notified properly.

Contributed by [ניר](https://github.com/nrbnlulu) via [PR #389](https://github.com/qtgql/qtgql/pull/389/)

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Fix a case that updates on Node implementors might try to compare to a field that
is null ATM of updating it. See 381.

Contributed by [ניר](https://github.com/nrbnlulu) via [PR #382](https://github.com/qtgql/qtgql/pull/382/)

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Fix a case that UUID input type wouldn't serialize.
Also adds better test for basic scalar inputs.

Contributed by [ניר](https://github.com/nrbnlulu) via [PR #378](https://github.com/qtgql/qtgql/pull/378/)

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Fix a case that interfaces couldn't store an object inside them
due to object types being defined after them.

Contributed by [ניר](https://github.com/nrbnlulu) via [PR #370](https://github.com/qtgql/qtgql/pull/370/)