fix warnings by bumping dependency on num-derive

lots of warnings were output about 'non-local imple definitions', which it
seems can simply be fixed by updating from num-derive 0.3 to 0.4.

note, num-derive 0.4 requires rustc 1.56+, but that's fine.

Author: jnqnfe

pulse-binding/Cargo.toml

@@ -16,7 +16,7 @@ rust-version = "1.63"
 libc = "0.2"
 bitflags = "1.2"
 num-traits = "0.2"
-num-derive = "0.3"
+num-derive = "0.4"
 libpulse-sys = { path = "../pulse-sys", version = "1.21", default-features = false }
 
 [target.'cfg(windows)'.dependencies]

pulse-sys/Cargo.toml

@@ -17,7 +17,7 @@ rust-version = "1.63"
 [dependencies]
 libc = "0.2"
 num-traits = "0.2"
-num-derive = "0.3"
+num-derive = "0.4"
 
 [target.'cfg(windows)'.dependencies]
 winapi = { version = "0.3", features = ["winsock2"], default-features = false }