Update to the next version of proc-macro2#426

Merged

dtolnay merged 21 commits intodtolnay:masterfrom

alexcrichton:next

May 21, 2018

Commits on May 17, 2018

Commits on May 20, 2018

Fix up some final issues

alexcrichton
authored and
dtolnay
committed
Update codegen Cargo.toml

alexcrichton
authored and
dtolnay
committed
Fix codegen

alexcrichton
authored and
dtolnay
committed
Add back fold_ident

alexcrichton
authored and
dtolnay
committed
Add a span to the apostrophe in `Lifetime`

alexcrichton
authored and
dtolnay
committed