Release 0.8.0 to stop public dependency on syntex

[erickt]

After we get the soon-to-be-released 0.7.10 out, how about we do a 0.8.0 release that also breaks serde_codegen's dependency on syntex, since that's caused a lot of havoc for people, as seen in #358?

Is it worthwhile trying to get the other v0.8.0 milestone tasks done?

This also could be done by just incrementing serde_codegen's version. If we do that, we should consider whether or not we should just pull serde_codegen and serde_macros into a separate repository, since the two aren't updated at the same time that often.

[dtolnay]

I think 0.8.0 can wait. People can already use expand in 0.7.9 to avoid being broken by Syntex - the register function doesn't break them if they don't use it.

The only other actionable issue scheduled for 0.8.0 (#267) does not seem urgent now that Cargo has a workaround.

[dtolnay]

I filed #376 regarding your idea to version serde_codegen and serde_macros independently from serde.

[dtolnay]

I am closing this issue now that we have the ball rolling on an 0.8.0 release. The Syntex dependency is removed in #445.