build(deps): bump indexmap from 1.8.0 to 1.8.1 (#4003)

Bumps [indexmap](https://github.com/bluss/indexmap) from 1.8.0 to 1.8.1.
- [Release notes](https://github.com/bluss/indexmap/releases)
- [Changelog](https://github.com/bluss/indexmap/blob/master/RELEASES.md)
- [Commits](https://github.com/bluss/indexmap/compare/1.8.0...1.8.1)

---
updated-dependencies:
- dependency-name: indexmap
  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>

Cargo.lock

@@ -1936,9 +1936,9 @@ checksum = "ce23b50ad8242c51a442f3ff322d56b02f08852c77e4c0b4d3fd684abc89c683"
 
 [[package]]
 name = "indexmap"
-version = "1.8.0"
+version = "1.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "282a6247722caba404c065016bbfa522806e51714c34f5dfc3e4a3a46fcb4223"
+checksum = "0f647032dfaa1f8b6dc29bd3edb7bbef4861b8b8007ebb118d6db284fd59f6ee"
 dependencies = [
  "autocfg 1.1.0",
  "hashbrown",

zebra-rpc/Cargo.toml

@@ -28,7 +28,7 @@ jsonrpc-derive = "18.0.0"
 jsonrpc-http-server = "18.0.0"
 # zebra-rpc needs the preserve_order feature in serde_json, which is a dependency of jsonrpc-core
 serde_json = { version = "1.0.79", features = ["preserve_order"] }
-indexmap = { version = "1.8.0", features = ["serde"] }
+indexmap = { version = "1.8.1", features = ["serde"] }
 
 tokio = { version = "1.17.0", features = ["time", "rt-multi-thread", "macros", "tracing"] }
 tower = "0.4.12"

zebrad/Cargo.toml

@@ -30,7 +30,7 @@ zebra-state = { path = "../zebra-state" }
 abscissa_core = "0.5"
 gumdrop = "0.7"
 chrono = "0.4.19"
-indexmap = "1.8.0"
+indexmap = "1.8.1"
 lazy_static = "1.4.0"
 serde = { version = "1.0.136", features = ["serde_derive"] }
 toml = "0.5.8"