useAsync T cannot be null

[jbojcic1]

Currently useAsync is defined as useAsync<T extends {}> which means it cannot be null or undefined when using ts strict mode.

Example: https://codesandbox.io/s/react-typescript-9x4j1

This makes it impossible to use promise which returns SomeData | null

[ghengeveld]

That's not right. @Khartir or @phryneas could you take a look?

[ghengeveld]

This is fixed in v10.0.0 which was released today.