Previously, `proc_macro2::Span::resolved_at` was gated behind cfg(procmacro2_semver_exempt). This gate has been removed in the latest version of proc-macro2, allowing us to avoid using `unwrap()` to use the underling method on `proc_macro::Span`
Previously, `proc_macro2::Span::resolved_at` was gated behind cfg(procmacro2_semver_exempt). This gate has been removed in the latest version of proc-macro2, allowing us to avoid using `unwrap()` to use the underling method on `proc_macro::Span`