Better definition for fallthrough.

Version 0.9.1

Last commit for version 0.9.0. (simdjson#1503)

* Last commit for version 0.9.0.

* Removing space.

More trimming.

Patch release.

Version 0.8.

Patch release 0.7.1

Releasing 0.7.0.

Moving it to 0.6.1.

Issue release