Bump the known_good_semver group with 1 update (paritytech#1375)

Bumps the known_good_semver group with 1 update: [syn](https://github.com/dtolnay/syn).

- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](dtolnay/syn@2.0.29...2.0.31)

---
updated-dependencies:
- dependency-name: syn
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: known_good_semver
...

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

Author: dependabot[bot]

substrate/client/chain-spec/derive/Cargo.toml

@@ -18,4 +18,4 @@ proc-macro = true
 proc-macro-crate = "1.1.3"
 proc-macro2 = "1.0.56"
 quote = "1.0.28"
-syn = "2.0.16"
+syn = "2.0.31"

substrate/client/tracing/proc-macro/Cargo.toml

@@ -18,4 +18,4 @@ proc-macro = true
 proc-macro-crate = "1.1.3"
 proc-macro2 = "1.0.56"
 quote = { version = "1.0.28", features = ["proc-macro"] }
-syn = { version = "2.0.16", features = ["proc-macro", "full", "extra-traits", "parsing"] }
+syn = { version = "2.0.31", features = ["proc-macro", "full", "extra-traits", "parsing"] }

substrate/frame/contracts/proc-macro/Cargo.toml

@@ -17,7 +17,7 @@ proc-macro = true
 [dependencies]
 proc-macro2 = "1.0.56"
 quote = "1.0.28"
-syn = { version = "2.0.16", features = ["full"] }
+syn = { version = "2.0.31", features = ["full"] }
 
 [dev-dependencies]
 

substrate/frame/election-provider-support/solution-type/Cargo.toml

@@ -15,7 +15,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 proc-macro = true
 
 [dependencies]
-syn = { version = "2.0.16", features = ["full", "visit"] }
+syn = { version = "2.0.31", features = ["full", "visit"] }
 quote = "1.0.28"
 proc-macro2 = "1.0.56"
 proc-macro-crate = "1.1.3"

substrate/frame/staking/reward-curve/Cargo.toml

@@ -18,7 +18,7 @@ proc-macro = true
 proc-macro-crate = "1.1.3"
 proc-macro2 = "1.0.56"
 quote = "1.0.28"
-syn = { version = "2.0.16", features = ["full", "visit"] }
+syn = { version = "2.0.31", features = ["full", "visit"] }
 
 [dev-dependencies]
 sp-runtime = { path = "../../../primitives/runtime" }

substrate/frame/support/procedural/Cargo.toml

@@ -21,7 +21,7 @@ cfg-expr = "0.15.4"
 itertools = "0.10.3"
 proc-macro2 = "1.0.56"
 quote = "1.0.28"
-syn = { version = "2.0.16", features = ["full"] }
+syn = { version = "2.0.31", features = ["full"] }
 frame-support-procedural-tools = { path = "tools" }
 proc-macro-warning = { version = "0.4.2", default-features = false }
 macro_magic = { version = "0.4.2", features = ["proc_support"] }

substrate/frame/support/procedural/tools/Cargo.toml

@@ -15,5 +15,5 @@ targets = ["x86_64-unknown-linux-gnu"]
 proc-macro-crate = "1.1.3"
 proc-macro2 = "1.0.56"
 quote = "1.0.28"
-syn = { version = "2.0.16", features = ["full", "visit", "extra-traits"] }
+syn = { version = "2.0.31", features = ["full", "visit", "extra-traits"] }
 frame-support-procedural-tools-derive = { path = "derive" }

substrate/frame/support/procedural/tools/derive/Cargo.toml

@@ -17,4 +17,4 @@ proc-macro = true
 [dependencies]
 proc-macro2 = "1.0.56"
 quote = { version = "1.0.28", features = ["proc-macro"] }
-syn = { version = "2.0.16", features = ["proc-macro", "full", "extra-traits", "parsing"] }
+syn = { version = "2.0.31", features = ["proc-macro", "full", "extra-traits", "parsing"] }

substrate/primitives/api/proc-macro/Cargo.toml

@@ -17,7 +17,7 @@ proc-macro = true
 
 [dependencies]
 quote = "1.0.28"
-syn = { version = "2.0.16", features = ["full", "fold", "extra-traits", "visit"] }
+syn = { version = "2.0.31", features = ["full", "fold", "extra-traits", "visit"] }
 proc-macro2 = "1.0.56"
 blake2 = { version = "0.10.4", default-features = false }
 proc-macro-crate = "1.1.3"

substrate/primitives/core/hashing/proc-macro/Cargo.toml

@@ -17,5 +17,5 @@ proc-macro = true
 
 [dependencies]
 quote = "1.0.28"
-syn = { version = "2.0.16", features = ["full", "parsing"] }
+syn = { version = "2.0.31", features = ["full", "parsing"] }
 sp-core-hashing = { path = "..", default-features = false}