todo

better error reporting and stack traces in strict mode
auto-enable of strict mode depending on compiler optimizaton level
investigate if weak table iteration can be invalidated
have reactive recomputations track sources dynamically?
- addresses case where sources are used in if-branching guarded by another source
- performance implications
implement from solid
- onCleanup > cleanup()
- Index > indexes()
- For > values()
- untrack
- batch
- async/resource/loading/suspense
- stores