use regex::Regex in pixiv link parse

Cargo.lock

@@ -1279,6 +1279,7 @@ dependencies = [
  "modular-bitfield",
  "parse-size",
  "proc_macros",
+ "regex",
  "reqwest",
  "tokio",
  "url",

Cargo.toml

@@ -27,6 +27,7 @@ lazy_static = "1.4"
 modular-bitfield = "0.11"
 parse-size = "1"
 proc_macros = { path = "proc_macros" }
+regex = "1"
 reqwest = { version = "0.11", features = ["brotli", "deflate", "gzip", "rustls-tls", "socks", "stream"] }
 RustyXML = "0.3"
 tokio = { version = "1.19", features = ["rt", "macros", "rt-multi-thread", "time"] }

src/pixiv_link.rs

@@ -1,5 +1,5 @@
 use crate::ext::json::ToJson;
-use fancy_regex::Regex;
+use regex::Regex;
 use json::JsonValue;
 use reqwest::IntoUrl;
 use std::convert::TryInto;
@@ -28,10 +28,6 @@ impl PixivID {
             return Some(PixivID::Artwork(num.unwrap()));
         }
         let re = RE.captures(s);
-        if re.is_err() {
-            return None;
-        }
-        let re = re.unwrap();
         if re.is_some() {
             let r = re.unwrap().name("id");
             if r.is_some() {