Update Rust crate futures to 0.3.30

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
futures (source)	dependencies	patch	0.3.28 -> 0.3.30

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Release Notes

rust-lang/futures-rs (futures)

v0.3.30

Compare Source

• Add {BiLock,SplitStream,SplitSink,ReadHalf,WriteHalf}::is_pair_of (#​2797)
• Fix panic in FuturesUnordered::clear (#​2809)
• Fix panic in AsyncBufReadExt::fill_buf (#​2801, #​2812)
• Improve support for targets without atomic CAS (#​2811)
• Remove build scripts (#​2811)

v0.3.29

Compare Source

• Add TryStreamExt::try_ready_chunks (#​2757)
• Add TryStreamExt::{try_all,try_any} (#​2783)
• Add UnboundedSender::{len,is_empty} (#​2750)
• Fix Sync impl of FuturesUnordered (#​2788)
• Fix infinite loop caused by invalid UTF-8 bytes (#​2785)
• Fix build error with -Z minimal-versions (#​2761)

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