Bump proc-macro2 from 1.0.29 to 1.0.30 (#4071)

Bumps [proc-macro2](https://github.com/alexcrichton/proc-macro2) from 1.0.29 to 1.0.30.
- [Release notes](https://github.com/alexcrichton/proc-macro2/releases)
- [Commits](https://github.com/alexcrichton/proc-macro2/compare/1.0.29...1.0.30)

---
updated-dependencies:
- dependency-name: proc-macro2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

polkadot/Cargo.lock

@@ -7377,9 +7377,9 @@ checksum = "eba180dafb9038b050a4c280019bbedf9f2467b61e5d892dcad585bb57aadc5a"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.29"
+version = "1.0.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b9f5105d4fdaab20335ca9565e106a5d9b82b6219b5ba735731124ac6711d23d"
+checksum = "edc3358ebc67bc8b7fa0c007f945b0b18226f78437d61bec735a9eb96b61ee70"
 dependencies = [
  "unicode-xid",
 ]

polkadot/node/overseer/overseer-gen/proc-macro/Cargo.toml

@@ -14,7 +14,7 @@ proc-macro = true
 [dependencies]
 syn = { version = "1.0.80", features = ["full", "extra-traits"] }
 quote = "1.0.10"
-proc-macro2 = "1.0.26"
+proc-macro2 = "1.0.30"
 proc-macro-crate = "1.1.0"
 
 [dev-dependencies]

polkadot/xcm/procedural/Cargo.toml

@@ -8,6 +8,6 @@ edition = "2018"
 proc-macro = true
 
 [dependencies]
-proc-macro2 = "1.0.28"
+proc-macro2 = "1.0.30"
 quote = "1.0.10"
 syn = "1.0.80"