1.0.23

• Fix several bugs involving lexing of unicode escapes and carriage returns in string literals (#256, #257, #258, #259, #260)

1.0.22

• Fix several bugs involving lexing of integer and float tokens with unusual suffixes (#252, #253, #254, #255)

1.0.21

• Match libproc_macro's UnwindSafe and RefUnwindSafe impls (#250)

1.0.20

• Match libproc_macro's rendering of whitespace in groups (#246, #247, thanks @Koxiaet)

1.0.19

• Remove procmacro2_semver_exempt feature gate on all methods stabilized in Rust 1.45 (#243)

1.0.18

• Fix discrepancy with libproc_macro in handling of negative numbers in token streams (#235)

1.0.17

• Allow using proc_macro2::fallback::force() from 1.0.12 at the same time as proc-macro2 = { default-features = false } (#233)

1.0.16

• impl Ord for proc_macro2::LineColumn (#230, rust-lang/rust#72446)

1.0.15

• Support parsing arbitrarily deeply nested token streams without using excessive stack space (#231, #232)

1.0.14

• Add Span::mixed_site(), which is behind cfg(procmacro2_semver_exempt) for now but will be stabilized when Rust 1.45 is released (#228, thanks @kevinmehall)
• Update LineColumn::column to match libproc_macro's column computation, which is character-based (#229, thanks @jrvidal)