Fail-safe file sequence

Implemented in Rust. Inspired by this Java implementation

Usage

let initial_value = 1;
let seq = FileSeq::new(store_dir, initial_value).unwrap();

// Get current value
seq.value().unwrap();

// Increment by 1 and get
seq.increment_and_get(1).unwrap();

// Get, then increment by 1
seq.get_and_increment(1).unwrap();

Changelog

0.2.0 (2020-09-07)

• Ignore errors on FileSeq::delete function #1