mla-1.4.0

Added/Changed

• Code cleaning
• Bump dependencies
• Benchmarking: reduce the number of test case per test, add new scenarios
• Explicitely ask for zeroize and static_secrets feature in x25519-dalek

Fixed

• FailSafe Reader: drastically improve performance
• Fix a Brotli-decompressor regression (following a minor update) and add corresponding tests