Bump crates.io version number.

1 job for 0.1.57 in 12 seconds (queued for 1 second)
Name Stage Failure
build Test
   |                             ^^^^^^^^^^^^^

error: aborting due to 13 previous errors

error: could not compile `redox_syscall`.

To learn more, run the command again with --verbose.
redoxer cargo: exit code: 101
ERROR: Job failed: exit code 1