0.4.20

• Provide unstable Group::span_open and span_close accessors to mirror the API in nightly (#134)

0.4.19

• FromIterator<TokenStream> for TokenStream (#130)

0.4.18

• Enable libproc_macro rich API with real spans when building on 1.29.0+ (#128)

0.4.17

• Performance optimization of impl PartialEq for Ident (#125)

0.4.16

• Hide some distracting stderr output when checking nightly support (#123)

0.4.15

• Provide Span::unstable method whenever nightly feature is enabled (#121)

0.4.14

• Automatically utilize libproc_macro rich API when building on 1.30.0+ (#120)

0.4.13

• Implement Extend<TokenStream> for TokenStream (#117)
• Optimize Extend<TokenTree> for TokenStream when building with "nightly" feature (#114)

0.4.12

• Restore support for musl targets that provide a binary releases of the compiler for musl

0.4.11

• Restore compatibility with old compilers (#112)