Changelog #276

#19243 allow unsetting default #[cfg]s.

#19265 add diagnostic for dangling dyn and impl.

#19226 (first contribution) improve completions that return a reference.

#19279 (first contribution) add letm and improve let keyword completion.

#19308 bring back support for Rust 1.78 projects.

#19261 support tuple structs in expand_rest_pattern.

#19324 fix adding of brackets in "Inline variable".

#19297 fix completion relevance check.

#19290 warn when cargo metadata fails.

#19292 handle modifiers in punctuation highlighting.

#19274 don’t highlight unsafe definitions as unsafe.

#19295 make "rust-analyzer: Run" available in manifest file.

#19288 (first contribution) use size_of from the prelude.

#19244, #19275 warn when the active toolchain is too old.

#19286 twiddle with the rustup invocation on CI.