fix: Enforce the shutdown timeout

[benjackwhite]

Problem

The shutdown timeout is misleading. If a fetch request is timing out we may still sit on it as we only do the check after it is done.

Changes

Change to a timeout based solution. It's a little complex but i think thats just the way.

Release info Sub-libraries affected

Bump level

• Major
• Minor
• Patch

Libraries affected

• All of them
• posthog-web
• posthog-node
• posthog-react-native

Changelog notes

• Shutdown will now respect the timeout and forcefully return rather than returning after the next fetch.

[github-actions]

Size Change: +751 B (+0.71%)

Total Size: 107 kB

Filename	Size	Change
posthog-node/lib/index.cjs.js	20.2 kB	+153 B (+0.76%)
posthog-node/lib/index.esm.js	20.1 kB	+153 B (+0.77%)
posthog-react-native/lib/posthog-core/src/index.js	9.86 kB	+137 B (+1.41%)
posthog-web/lib/index.cjs.js	17.3 kB	+154 B (+0.9%)
posthog-web/lib/index.esm.js	17.2 kB	+154 B (+0.9%)

ℹ️ View Unchanged

Filename	Size
posthog-react-native/lib/posthog-core/src/eventemitter.js	1.08 kB
posthog-react-native/lib/posthog-core/src/lz-string.js	1.42 kB
posthog-react-native/lib/posthog-core/src/types.js	365 B
posthog-react-native/lib/posthog-core/src/utils.js	822 B
posthog-react-native/lib/posthog-core/src/vendor/uuidv7.js	2.04 kB
posthog-react-native/lib/posthog-react-native/index.js	485 B
posthog-react-native/lib/posthog-react-native/src/autocapture.js	1.8 kB
posthog-react-native/lib/posthog-react-native/src/frameworks/wix-navigation.js	651 B
posthog-react-native/lib/posthog-react-native/src/hooks/useFeatureFlag.js	437 B
posthog-react-native/lib/posthog-react-native/src/hooks/useFeatureFlags.js	362 B
posthog-react-native/lib/posthog-react-native/src/hooks/useLifecycleTracker.js	416 B
posthog-react-native/lib/posthog-react-native/src/hooks/useNavigationTracker.js	628 B
posthog-react-native/lib/posthog-react-native/src/hooks/usePostHog.js	249 B
posthog-react-native/lib/posthog-react-native/src/legacy.js	810 B
posthog-react-native/lib/posthog-react-native/src/native-deps.js	1.17 kB
posthog-react-native/lib/posthog-react-native/src/optional/OptionalAsyncStorage.js	183 B
posthog-react-native/lib/posthog-react-native/src/optional/OptionalExpoApplication.js	215 B
posthog-react-native/lib/posthog-react-native/src/optional/OptionalExpoDevice.js	211 B
posthog-react-native/lib/posthog-react-native/src/optional/OptionalExpoFileSystem.js	224 B
posthog-react-native/lib/posthog-react-native/src/optional/OptionalExpoLocalization.js	216 B
posthog-react-native/lib/posthog-react-native/src/optional/OptionalReactNativeDeviceInfo.js	220 B
posthog-react-native/lib/posthog-react-native/src/optional/OptionalReactNativeNavigation.js	218 B
posthog-react-native/lib/posthog-react-native/src/optional/OptionalReactNativeNavigationWix.js	222 B
posthog-react-native/lib/posthog-react-native/src/optional/OptionalSessionReplay.js	231 B
posthog-react-native/lib/posthog-react-native/src/posthog-rn.js	4.08 kB
posthog-react-native/lib/posthog-react-native/src/PostHogContext.js	210 B
posthog-react-native/lib/posthog-react-native/src/PostHogProvider.js	1.57 kB
posthog-react-native/lib/posthog-react-native/src/storage.js	1.09 kB
posthog-react-native/lib/posthog-react-native/src/types.js	90 B
posthog-react-native/lib/posthog-react-native/src/version.js	124 B

_{compressed-size-action}

[marandaneto]

@benjackwhite if you add changelog - update version we can cut a version o/