v1.20.2

• zstd: Fix DecodeAll crash on specially crafted input. GHSA-fpmh-frq8-7rj8.
• s2: fix LZ4 block conversion writing past dst by @klauspost in #1244
• dict: Stricter input validation by @klauspost in #1250
• zstd: reject snappy copy shorter than minimum match by @Raghuvardhan-Reddy78 in #1235

Full Changelog: v1.20.1...v1.20.2