IsIdle's detectVisibilityChanges default should be consistent with its docs

[derheld42]

Describe the bug

I think the default for IsIdle's detectVisibilityChanges is actually false, but the API docs indicate it's true. I could put out a pull request if you'd like.

Reproduction

const idle = new IsIdle({ timeout: 5000 });

watch(
	() => idle.current,
	(cur, prev) => {
		if (cur) {
			console.log('IDLE');
		}
		if (prev && cur == false) {
			console.log('No longer idle!');
		}
	},
);

Then switch to a different tab, wait 5 seconds, come back.. No "No longer idle" message seen, but should be IF we were detecting visibility changes as the docs say.

then change first line to this:
const idle = new IsIdle({ timeout: 5000, detectVisibilityChanges: true });

Then switch to a different tab, wait 5 seconds, come back.. "No longer idle" message seen. This is what I was expecting it do without specifying "detectVisibilityChanges: true"

Logs

No response

System Info

System:
    OS: Linux 6.8 Ubuntu 24.04.1 LTS 24.04.1 LTS (Noble Numbat)
    CPU: (16) x64 AMD Ryzen 9 PRO 7940HS w/ Radeon 780M Graphics
    Memory: 48.63 GB / 61.45 GB
    Container: Yes
    Shell: 5.2.21 - /bin/bash
  Binaries:
    Node: 20.17.0 - ~/.nvm/versions/node/v20.17.0/bin/node
    npm: 10.8.2 - ~/.nvm/versions/node/v20.17.0/bin/npm
  npmPackages:
    @sveltejs/kit: ^2.5.27 => 2.8.4 
    runed: ^0.15.4 => 0.15.4 
    svelte: ^5.0.0 => 5.2.8

Severity

annoyance