Rename unstable_handleError to componentDidCatch

Proprietary

Renames the unstable error boundary method to the official componentDidCatch API introduced in React 16.

org.openrewrite.react.16.error-boundaries
mod run . --recipe=org.openrewrite.react.16.error-boundaries

Install it once, then run it on every repository under the current directory. New to the Moderne CLI? Set it up.