Updated Emscripten Dropped Ubuntu 20

Updated emscripten to 4.0.4, removed some no longer necessary fixup tools running on windows, because it now works out of the box.
Dropped support for Ubuntu 20

v0.18.5 Added missing header

libc++ reduced transitive includes in C++23.
Added missing header.

v0.18.4 Compatibility with Boost 1.87.0

Merge pull request #130 from NuiCpp/feat/boost-1_87-updates

Updated roar revision.

v0.18.3 Update Dependencies

Update underlying dependencies to work with newer boost versions.

v0.18.2 Made some tidy improvements and fixed / improved ScopeExit utility class

What's Changed

• Clang Tidy Improvements & OBSERVED_BUNDLE_FILES by @5cript in #127
• Fixed scope exit class. by @5cript, reported by @DNKpp in #128

Full Changelog: v0.18.1...v0.18.2

v0.18.1 Fixed CMake Build Order Dependencies

Merge pull request #126 from NuiCpp/fix/better-parcel-target

Changed parcel target to custom command.

v0.18.0 Rendering Optimization Rework

This is a big one!

Observed vectors and deques rendering is now optimized as originally intended.

• Modifications only ever cause render changes to affected elements.
• Erasures only erase affected elements and dont cause rerenders of existing elements.
• Inserts only insert at given positions and dont cause other elements to be rerendered.

Also added a feature where elements can be created into an element, that is not somewhere in the Nui DOM.
This allows the user to create Elements from C++ and hand them to javascript libraries.

Beware now that indices in the range render function can make the view go out of sync, because indices are not updating due to this important optimization. If you render indices you need to bypass the optimization by calling observed.modify(); // or observed.modifyNow()

v0.17.1 Fixed bug with Custom Event Context

The Observed(EventContext* ctx) constructor could be selected too easily by accident.
This now requires passing an extra parameter.

Added deferred tags

It is sometimes necessary to do things on the element AFTER it was inserted into the dom.

This is now possible with deferred attributes/properties.
Syntax still needs some improvement.

div {
  reference.onMaterialize(/*...*/).defer(true)
  // or !(class_ = "asdf")
}()

This will become this in an upcoming PR:

div {
  !class_ = "asdf"
}()

v0.16.0 listen function added

You can now also listen to events on Observed<>

#include <nui/event_system/listen.hpp>

Observed<int> obs;
listen(obs, [](int const& i) {
   // ...  
});

obs = 7;
Nui::globalEventContext.executeActiveEventsImmediately();

Also observed now accept other (user) event contexts.
Which is useful to decouple app events von UI events.

#include <nui/event_system/listen.hpp>

Nui::EventContext userContext;
Observed<int> obs{userContext};
listen(userContext, obs, [](int const& i) {
   // ...
});

obs = 7;
userContext.executeActiveEventsImmediately();