proc-macro2 versioning

[0xTylerHolmes]

Description

Building lighthouse on later versions of nightly fail due to proc-macro2. The issue was fixed via: proc-macro2 1.0.60

Version

rust: 1.72.0-nightly (839e9a6e1 2023-07-02)
lighthouse: stable/unstable

Present Behavior

Failure to compile:

error[E0635]: unknown feature `proc_macro_span_shrink`
  --> /home/z3n/.cargo/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.58/src/lib.rs:92:30
   |
92 |     feature(proc_macro_span, proc_macro_span_shrink)
   |                              ^^^^^^^^^^^^^^^^^^^^^^

   Compiling static_assertions v1.1.0
   Compiling pkg-config v0.3.27
   Compiling futures-sink v0.3.28
   Compiling itertools v0.10.5
   Compiling itoa v1.0.6
For more information about this error, try `rustc --explain E0635`.
error: could not compile `proc-macro2` (lib) due to previous error
warning: build failed, waiting for other jobs to finish...
error: failed to compile `lighthouse v4.2.0 (/home/z3n/git/lighthouse/lighthouse)`, intermediate artifacts can be found at `/home/z3n/git/lighthouse/target`.
To reuse those artifacts with a future compilation, set the environment variable `CARGO_TARGET_DIR` to that path.
make: *** [Makefile:48: install] Error 101

Expected Behavior

compile

Steps to resolve

version bump proc-macro2 -> 1.0.60

see: rust-lang/rust#113152