build(deps): bump proc-macro2 from 1.0.17 to 1.0.18

Bumps [proc-macro2](https://github.com/alexcrichton/proc-macro2) from 1.0.17 to 1.0.18.
- [Release notes](https://github.com/alexcrichton/proc-macro2/releases)
- [Commits](https://github.com/alexcrichton/proc-macro2/compare/1.0.17...1.0.18)

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

Cargo.lock

@@ -31,7 +31,7 @@ name = "async-trait"
 version = "0.1.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -231,7 +231,7 @@ name = "failure_derive"
 version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
  "synstructure 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -328,7 +328,7 @@ version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro-hack 0.5.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -872,7 +872,7 @@ name = "pin-project-internal"
 version = "0.4.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -950,7 +950,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.17"
+version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -977,7 +977,7 @@ name = "quote"
 version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1147,7 +1147,7 @@ name = "serde_derive"
 version = "1.0.110"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1222,7 +1222,7 @@ name = "snafu-derive"
 version = "0.6.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1251,7 +1251,7 @@ name = "syn"
 version = "1.0.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1261,7 +1261,7 @@ name = "synstructure"
 version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1330,7 +1330,7 @@ name = "tokio-macros"
 version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1553,7 +1553,7 @@ dependencies = [
  "bumpalo 2.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
  "wasm-bindgen-shared 0.2.56 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1584,7 +1584,7 @@ name = "wasm-bindgen-macro-support"
 version = "0.2.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
  "wasm-bindgen-backend 0.2.56 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1604,7 +1604,7 @@ dependencies = [
  "anyhow 1.0.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
  "wasm-bindgen-backend 0.2.56 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1799,7 +1799,7 @@ dependencies = [
 "checksum ppv-lite86 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "237a5ed80e274dbc66f86bd59c1e25edc039660be53194b5fe0a482e0f2612ea"
 "checksum proc-macro-hack 0.5.16 (registry+https://github.com/rust-lang/crates.io-index)" = "7e0456befd48169b9f13ef0f0ad46d492cf9d2dbb918bcf38e01eed4ce3ec5e4"
 "checksum proc-macro-nested 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8e946095f9d3ed29ec38de908c22f95d9ac008e424c7bcae54c75a79c527c694"
-"checksum proc-macro2 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)" = "1502d12e458c49a4c9cbff560d0fe0060c252bc29799ed94ca2ed4bb665a0101"
+"checksum proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)" = "beae6331a816b1f65d04c45b078fd8e6c93e8071771f41b8163255bbd8d7c8fa"
 "checksum pulldown-cmark 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "1c205cc82214f3594e2d50686730314f817c67ffa80fe800cf0db78c3c2b9d9e"
 "checksum quick-error 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a1d01941d82fa2ab50be1e79e6714289dd7cde78eba4c074bc5a4374f650dfe0"
 "checksum quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "54a21852a652ad6f610c9510194f398ff6f8692e334fd1145fed931f7fbe44ea"