* Change DefaultMaxDepth from 1024 to 32 * Switch sr-arithmetic benchmarking to criterion * Update core/sr-arithmetic/Cargo.toml Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com> * Update core/sr-arithmetic/benches/bench.rs Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com> * Test on variable limb lengths * Change license * Rework division