* ci: Update actions, replace actions-rs.
* `actions/checkout` is updated from `v1` to the current `v4`.
* `actions-rs/toolchain` is replaced by `dtolnay/rust-toolchain` as
the `actions-rs` actions haven't been maintained in a long time.
* clippy: Remove unnecessary call to `into_iter`.
The parameter takes `IntoIterator`, so we don't have to call
`into_iter` at the call site.
* clippy: Remove explicit lifetime that can be elided.
* clippy: tests: Fix useless conversion warnings.
* clippy: tests: Remove call to `format!`.
* Fix minimal-versions build.
Due to changes in the nightly compiler, using a recent nightly
requires proc-macro2 1.0.60 or later:
https://github.com/dtolnay/proc-macro2/issues/356
* ci: Use is-terminal 0.4.7 for MSRV builds.
is-terminal 0.4.8 updated its MSRV to 1.63, so we can't use it
with our MSRV of 1.56. Force usage of the older version which has
an older MSRV.
This PR overhauls the toplevel/main experience for `miette`. It adds a new `Report` type based on `eyre::Report` and overhauls various types to fit into this model, as well as prepare for some [future changes in Rust](https://github.com/nrc/rfcs/pull/1) that will make it possible to integrate `miette` directly with crates like `eyre` instead of having to use this specific `Report`.
As such, this PR is a major breaking change, especially for anyone using `DiagnosticReport` and company.
BREAKING CHANGES:
* `DiagnosticReport` is now just `Report`, and is a different, `eyre::Report`-like type.
* `DiagnosticResult` is now just `Result`.
* `.into_diagnostic()` now just transforms the error into a `Report`.
* `DiagnosticReportPrinter` has been replaced with `ReportHandler`
* `set_printer` has been replaced by `set_hook`
* `code` is now optional.
* `.into_diagnostic()` no longer takes a `code` argument.
* `#[diagnostic]` is now optional when deriving `Diagnostic`.
Brooks Rady
Gavrilikhin Daniil
Bruce Mitchener
Daniel Rivas
Kat Marchán
Paul Colomiets
Cormac Relf