build(deps): bump prost from 0.10.3 to 0.10.4 (#4490)

Bumps [prost](https://github.com/tokio-rs/prost) from 0.10.3 to 0.10.4.
- [Release notes](https://github.com/tokio-rs/prost/releases)
- [Commits](https://github.com/tokio-rs/prost/compare/v0.10.3...v0.10.4)

---
updated-dependencies:
- dependency-name: prost
  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>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Cargo.lock

@@ -3514,9 +3514,9 @@ dependencies = [
 
 [[package]]
 name = "prost"
-version = "0.10.3"
+version = "0.10.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc03e116981ff7d8da8e5c220e374587b98d294af7ba7dd7fda761158f00086f"
+checksum = "71adf41db68aa0daaefc69bb30bcd68ded9b9abaad5d1fbb6304c4fb390e083e"
 dependencies = [
  "bytes",
  "prost-derive",

zebrad/Cargo.toml

@@ -99,7 +99,7 @@ tokio = { version = "1.18.2", features = ["full", "test-util"] }
 tokio-stream = "0.1.8"
 
 # test feature lightwalletd-grpc-tests
-prost = "0.10.3"
+prost = "0.10.4"
 tonic = "0.7.2"
 
 proptest = "0.10.1"