GHSA-w4cm-gvhj-cgw6: Jawn: Quadratic parsing effort in AsyncParser

`AsyncParser` can be forced to perform O(n^2) work on the length of the input. When a single JSON token arrives across many small chunks, each `absorb` call rescans the incomplete token from the start. ### Impact Denial of service via CPU exhaustion when parsing untrusted JSON. Preconditions: - Application uses `AsyncParser` - Attacker can send large tokens with control over chunk sizes. ### Patches Fixed in jawn-parser-1.7.0. ### Workarounds If you can't upgrade immediately: - Use the synchronous `Parser`. …