Bump serde_json from 1.0.75 to 1.0.78

Bumps [serde_json](https://github.com/serde-rs/json) from 1.0.75 to 1.0.78.
- [Release notes](https://github.com/serde-rs/json/releases)
- [Commits](serde-rs/json@v1.0.75...v1.0.78)

---
updated-dependencies:
- dependency-name: serde_json
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Cargo.toml

@@ -37,7 +37,7 @@ blake2 = "0.10.2"
 contract-metadata = { version = "0.5.0", path = "./metadata" }
 semver = { version = "1.0.4", features = ["serde"] }
 serde = { version = "1.0.135", default-features = false, features = ["derive"] }
-serde_json = "1.0.75"
+serde_json = "1.0.78"
 tempfile = "3.3.0"
 url = { version = "2.2.2", features = ["serde"] }
 impl-serde = "0.3.2"

metadata/Cargo.toml

@@ -21,7 +21,7 @@ path = "lib.rs"
 impl-serde = "0.3.2"
 semver = { version = "1.0.4", features = ["serde"] }
 serde = { version = "1.0.135", default-features = false, features = ["derive"] }
-serde_json = "1.0.75"
+serde_json = "1.0.78"
 url = { version = "2.2.2", features = ["serde"] }
 
 [dev-dependencies]