release: 0.1.1

[lemmih]

Summary

Release version 0.1.1

Fixed

• Fix int_signum! macro incorrectly handling minimum signed integer values (e.g., i8::MIN, i16::MIN, etc.)
• Fix incircle predicates performing subtractions outside signum macros, causing potential overflow for integer types

Added

• QuickCheck tests for i8 orient2d, cmp_dist, and incircle predicates
• Benchmark for incircle predicate

Changed

• Enable optimizations (opt-level = 2) for debug builds while maintaining overflow checks
• Increase QuickCheck test iterations from 200-300 to 10,000 for more thorough coverage