Bump version to 0.9.0, update CHANGELOG.md

[MaxDesiatov]

I'm preparing a new carton release for SwiftWasm 5.3.1, would be great to update its bundled runtime bits and include support for throwing functions from the newly tagged 0.9.0.

[github-actions]

Time Change: +36.75ms (0%)

Total Time: 10,778.5ms

ℹ️ View Unchanged

Test name	Duration	Change
Serialization/Write JavaScript number directly	213.5ms	+7ms (3%)
Serialization/Write JavaScript string directly	210.5ms	+0.25ms
Serialization/Swift Int to JavaScript	3,511.5ms	+7.25ms (0%)
Serialization/Swift String to JavaScript	3,515.75ms	+31ms (0%)
Object heap/Increment and decrement RC	3,327.25ms	-8.75ms (0%)

_{performance-action}