Update proconio to 0.3.4

Starting from 0.3.3, `proconio` re-exports `proconio-derive` gated by
`derive` feature gate.  It is recommended to use this feature instead of
using raw `proconio-derive`.

Author: statiolake

Cargo.lock

@@ -13,8 +13,7 @@ path = "src/main.rs"
 # AtCoder 2019年言語アップデート以降に使用できるクレート
 
 # 競技プログラミングの入出力サポート
-proconio = "=0.3.0"
-proconio-derive = "=0.1.5"
+proconio = { version = "=0.3.4", features = ["derive"] }
 
 # f64のOrd/Eq実装
 ordered-float = "=1.0.2"

Cargo.toml

@@ -26,15 +26,15 @@ fn main() -> UnitResult {
 // https://atcoder.jp/contests/abs/fasks/arc089_a
 
 // proconio
-#[proconio_derive::fastout]
+#[proconio::fastout]
 fn run_proconio() {
     use proconio::source::{line::LineSource, once::OnceSource, Source};
     use std::io::BufReader;
 
     run_proconio_for::<OnceSource<BufReader<&[u8]>>>();
     run_proconio_for::<LineSource<BufReader<&[u8]>>>();
 
-    #[proconio_derive::fastout]
+    #[proconio::fastout]
     fn run_proconio_for<'a, T: Source<BufReader<&'a [u8]>> + From<&'a str>>() {
         use proconio::input;