Update thiserror requirement from 1 to 2

Updates the requirements on thiserror to permit the latest version.

Release notes

2.0.0

Breaking changes
Referencing keyword-named fields by a raw identifier like {r#type} inside a format string is no longer accepted; simply use the unraw name like {type} (#347)

This aligns thiserror with the standard library's formatting macros, which gained support for implicit argument capture later than the release of this feature in thiserror 1.x.
#[derive(Error, Debug)]
#[error("... {type} ...")]  // Before: {r#type}
pub struct Error {
    pub r#type: Type,
}
Trait bounds are no longer inferred on fields whose value is shadowed by an explicit named argument in a format message (#345)
// Before: impl<T: Octal> Display for Error<T>
// After: impl<T> Display for Error<T>
#[derive(Error, Debug)]
#[error("{thing:o}", thing = "...")]
pub struct Error<T> {
    thing: T,
}
Tuple structs and tuple variants can no longer use numerical {0} {1} access at the same time as supplying extra positional arguments for a format message, as this makes it ambiguous whether the number refers to a tuple field vs a different positional arg (#354)
#[derive(Error, Debug)]
#[error("ambiguous: {0} {}", $N)]
//                  ^^^ Not allowed, use #[error("... {0} {n}", n = $N)]
pub struct TupleError(i32);
Code containing invocations of thiserror's derive(Error) must now have a direct dependency on the thiserror crate regardless of the error data structure's contents (#368, #369, #370, #372)
Features
Support disabling thiserror's standard library dependency by disabling the default "std" Cargo feature: thiserror = { version = "2", default-features = false } (#373)
Support using r#source as field name to opt out of a field named "source" being treated as an error's Error::source() (#350)
#[derive(Error, Debug)]
#[error("{source} ==> {destination}")]
pub struct Error {
    r#source: char,
    destination: char,

... (truncated)

Commits

6097d61 Release 2.0.0
40113bd Merge pull request #373 from dtolnay/nostd
d8ed5fb Allow disabling std dependency on 1.81+
8277ec4 Merge pull request #372 from dtolnay/stdbacktrace
d6d896d Access Backtrace exclusively through ::thiserror
d14adfb Merge pull request #371 from dtolnay/coreprovider
2e99c51 Drop Provider API support in pre-1.81 nightlies
bf3d6f3 Merge pull request #370 from dtolnay/stderror
e0e9943 Access Error trait exclusively through ::thiserror
db7825e Merge pull request #369 from dtolnay/stdpath
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Majored / rs-async-zip

Update thiserror requirement from 1 to 2 #152

2.0.0

Breaking changes

Features