Bump Cargo.toml to 0.11.0, pin the README install snippet to "0.11",
and add the 0.11.0 CHANGELOG section.
Release highlights:
- a full permutation crossover/mutation toolkit (OX, PMX, CX, ERX
crossovers; Inversion, Insertion, Scramble mutations);
- a micro-benchmark-guided performance pass over the combinatorial
operators and the Pareto/metrics machinery;
- a whole-program profiling campaign that cut the `compare`
workload's instruction count 357.06B -> 165.31B (-53.7%), all
bit-identical.
No public-API breaks — the release is purely additive.