proc-macro2 1.0.6

A stable implementation of the upcoming new `proc_macro` API. Comes with an option, off by default, to also reimplement itself in terms of the upstream unstable API.
Builds

proc-macro2's sandbox limits

All the builds on docs.rs are executed inside a sandbox with limited resources. The limits for this crate are the following:

Available RAM 3 GB
Maximum rustdoc execution time 15 minutes
Maximum size of a build log 100 KB
Network access blocked

If a build fails because it hit one of those limits please open an issue to get them increased.