v0.2.6

Added

• (encode) faster entropy stage and a lazy match-finder switch (#626)

Performance

• (ldm) close the level-1 long-distance gap to libzstd (#632)
• (encode) keep the level-1 bit writers' flushes and FSE states off the critical path (#630)
• (encode) bring the level-1 entropy stage to libzstd's pace (#628)