Merge #168: chore: use the alloc feature on serde_json

5c57ee4 chore: use the `alloc` feature on `serde_json` (Luis Schwab)

Pull request description:

  This PR imports `serde_json` with the `alloc` feature.

ACKs for top commit:
  oleonardolima:
    ACK 5c57ee4

Tree-SHA512: cfd01e89c2ec57507d9b44fb7bbe03a308f6d4c90a0c858dd3f9666f5d5011fb5bad1ebb6fb68f807a4174eb4c317749ad4d9cbd1d17832f5c027a4f8188f603

Author: oleonardolima

Cargo.toml

@@ -21,7 +21,7 @@ path = "src/lib.rs"
 
 [dependencies]
 serde = { version = "1.0", features = ["derive"] }
-serde_json = { version = "1.0", default-features = false }
+serde_json = { version = "1.0", features = ["alloc"], default-features = false }
 bitcoin = { version = "0.32", features = ["serde", "std"], default-features = false }
 hex = { version = "0.2", package = "hex-conservative" }
 log = "^0.4"