Releases the following `rc.0` versions for crates which have not
previously received such a release and were previously tagged `-pre`:

- `ascon-hash256` v0.5.0-rc.0
- `fsb` v0.2.0-rc.0
- `gost94` v0.11.0-rc.0
- `groestl` v0.11.0-rc.0
- `jh` v0.2.0-rc.0
- `k12` v0.4.0-rc.0
- `md2` v0.11.0-rc.0
- `md4` v0.11.0-rc.0
- `sha1-checked` v0.11.0-rc.0
- `shabal` v0.5.0-rc.0
- `skein` v0.2.0-rc.0
- `tiger` v0.3.0-rc.0

Closes #766