GeezerVison

fix: bumped up tempfile to "3.26.0"

The variables for --bytes, --ignore-initial and line count where size 'usize',
thus limiting the readable bytes on 32-bit systems.
GNU cmp is compiled with LFS (Large File Support) and allows i64 values.

This is now all u64, which works also on 32-bit systems with Rust.
There is no reason to implement a 32-bit barrier for 32 bit machines.

Additionally the --bytes limit can be set to 'u128' using the feature
"cmp_bytes_limit_128_bit".

The performance impact would be negligible, as there only few calculations
each time a full block is read from the file.

u64 seems the max file size with Rust, which is an Exabyte.

Renamed type to Skip as this seems preferred.

…u64/u128---ignore-initial--u64

…mit-to-u64/u128---ignore-initial--u64

…mit-to-u64/u128---ignore-initial--u64