Reexport external crates
See also #68
Motivated by avatar support where sha1 is required. sha1 is not reexported by parsers.
Other stuff potential useful for export:
- tokio_xmpp:
- log
- rand
- hickory-resolver
- idna
- parsers
- base64
- digest
- chrono
- sha2/sha3/blake2
- xmpp
- reqwest