Bump serde_json from 1.0.67 to 1.0.68 (use-ink#346)

Bumps [serde_json](https://github.com/serde-rs/json) from 1.0.67 to 1.0.68.
- [Release notes](https://github.com/serde-rs/json/releases)
- [Commits](serde-rs/json@v1.0.67...v1.0.68)

---
updated-dependencies:
- dependency-name: serde_json
  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.toml

@@ -36,7 +36,7 @@ blake2 = "0.9.2"
 contract-metadata = { version = "0.3.0", path = "./metadata" }
 semver = { version = "1.0.4", features = ["serde"] }
 serde = { version = "1.0.130", default-features = false, features = ["derive"] }
-serde_json = "1.0.67"
+serde_json = "1.0.68"
 tempfile = "3.2.0"
 url = { version = "2.2.2", features = ["serde"] }
 impl-serde = "0.3.1"

metadata/Cargo.toml

@@ -19,7 +19,7 @@ path = "lib.rs"
 [dependencies]
 semver = { version = "1.0.4", features = ["serde"] }
 serde = { version = "1.0.130", default-features = false, features = ["derive"] }
-serde_json = "1.0.67"
+serde_json = "1.0.68"
 url = { version = "2.2.2", features = ["serde"] }
 
 [dev-dependencies]