Release 0.5.60

Release 0.5.59

Release 0.5.58

Release 0.5.57

Release 0.5.56

Release 0.5.55

Release 0.5.54

Release 0.5.53

Release 0.5.52

Release 0.5.51

The publication of 0.5.50 to crates.io had a mistake: I forgot to do
`git submodule update --init` after checking out the honggfuzz-rs repo..

This new release doesn't have any changes, it is only to fix the
publication.

Closes #44