Bump prometheus from 0.13.0 to 0.13.1 (#698)

Bumps [prometheus](https://github.com/tikv/rust-prometheus) from 0.13.0 to 0.13.1.
- [Release notes](https://github.com/tikv/rust-prometheus/releases)
- [Changelog](https://github.com/tikv/rust-prometheus/blob/master/CHANGELOG.md)
- [Commits](tikv/rust-prometheus@v0.13.0...v0.13.1)

---
updated-dependencies:
- dependency-name: prometheus
  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>

Author: dependabot[bot]

Cargo.lock

@@ -19,7 +19,7 @@ jsonrpc-pubsub = "18.0"
 libsecp256k1 = "0.7"
 log = "0.4.17"
 lru = "0.7.5"
-prometheus = { version = "0.13.0", default-features = false }
+prometheus = { version = "0.13.1", default-features = false }
 rand = "0.8"
 rlp = "0.5"
 tokio = { version = "1.18", features = ["sync"] }