feat: dispose effect() with resource management

[marvinhagemeister]

Add support for disposing effect()'s with the using keyword from the stage 3 explicit resource management proposal.

const count = signal(0);

function doSomething() {
  // The `using` keyword calls dispose at the end of
  // this function scope
  using _ = effect(() => {
    console.log(count.value);
    return () => console.log("disposed");
  });

  console.log("hey");
}

doSomething();
// Logs:
//  0
//  hey
//  disposed

Needed to update the babel toolchain to support parsing the using keyword in our test setup.

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🦋 Changeset detected

Latest commit: 4045d2d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@preact/signals-core	Minor

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[github-actions]

Size Change: -51 B (-0.06%)

Total Size: 87.6 kB

Filename	Size	Change
docs/dist/assets/bench.********.js	1.59 kB	+1 B (+0.06%)
docs/dist/assets/signals-core.module.********.js	1.53 kB	+14 B (+0.93%)
docs/dist/assets/signals.module.********.js	2.04 kB	-1 B (-0.05%)
docs/dist/demos-********.js	4.32 kB	-4 B (-0.09%)
docs/dist/nesting-********.js	1.13 kB	+2 B (+0.18%)
docs/dist/react-********.js	239 B	-2 B (-0.83%)
packages/core/dist/signals-core.js	1.56 kB	+15 B (+0.97%)
packages/core/dist/signals-core.mjs	1.57 kB	+13 B (+0.83%)
packages/react-transform/dist/signals-*********.js	5.93 kB	-40 B (-0.67%)
packages/react-transform/dist/signals-transform.mjs	5.12 kB	-10 B (-0.2%)
packages/react-transform/dist/signals-transform.umd.js	6.04 kB	-39 B (-0.64%)

ℹ️ View Unchanged

Filename	Size
docs/dist/assets/client.********.js	46.2 kB
docs/dist/assets/index.********.js	1.09 kB
docs/dist/assets/jsxRuntime.module.********.js	283 B
docs/dist/assets/preact.module.********.js	4.01 kB
docs/dist/assets/style.********.js	21 B
docs/dist/assets/style.********.css	1.24 kB
docs/dist/basic-********.js	243 B
packages/preact/dist/signals.js	1.57 kB
packages/preact/dist/signals.mjs	1.53 kB
packages/react/dist/signals.js	188 B
packages/react/dist/signals.mjs	150 B

_{compressed-size-action}

[marvinhagemeister]

Needed to add this because the newer TS version complains about something in sinon types

[JoviDeCroock]

That's a great addition!