Issue #1876: Explicitly declare the used features for each dependency…

… in parquet (#1895)

Declare that parquet module uses rand's std and std_rng features

Signed-off-by: Martin Tzvetanov Grigorov <mgrigorov@apache.org>

parquet/Cargo.toml

@@ -46,7 +46,7 @@ arrow = { path = "../arrow", version = "16.0.0", optional = true, default-featur
 base64 = { version = "0.13", default-features = false, features = ["std"], optional = true }
 clap = { version = "~3.1", default-features = false, features = ["std", "derive", "env"], optional = true }
 serde_json = { version = "1.0", default-features = false, optional = true }
-rand = { version = "0.8", default-features = false }
+rand = { version = "0.8", default-features = false, features = ["std", "std_rng"] }
 futures = { version = "0.3", default-features = false, features = ["std" ], optional = true }
 tokio = { version = "1.0", optional = true, default-features = false, features = ["macros", "fs", "rt", "io-util"] }