New 0.2.x release to fix rustc error

[Mark-Simulacrum]

We use the 0.2.29 release in perf.rust-lang.org's html5ever benchmark which currently errors with this error. Can we release a 0.2.30 with a fix? I can try to prepare a PR it would be accepted.

error: macro-expanded `macro_export` macros from the current crate cannot be referred to by absolute paths
  --> /home/alex/.cargo/registry/src/github.com-1ecc6299db9ec823/string_cache-0.2.29/src/lib.rs:71:13
   |
71 |     pub use atom;
   |             ^^^^
   |
note: the macro is defined here
  --> /tmp/.tmpFazpQK/target/debug/build/string_cache-589ae806702507d8/out/atom_macro.rs:2:1
   |
2  | / macro_rules! atom {
3  | | (\"sdev\") => { $crate::Atom { unsafe_data: 0x2 } };
4  | | (\"onstart\") => { $crate::Atom { unsafe_data: 0x100000002 } };
5  | | (\"overflow\") => { $crate::Atom { unsafe_data: 0x200000002 } };
...  |
127| | (\"stroke-miterlimit\") => { $crate::Atom { unsafe_data: 0x4f400000002 } };
127| | }
   | |_^

error: aborting due to previous error

cc rust-lang/rust#53495

[jdm]

I would accept and publish a change to fix that.

[Mark-Simulacrum]

@jdm There doesn't seem to be a tag for 0.2.29, is there a chance it's just not been pushed?

[jdm]

No, we just aren't always great at tagging releases.