Make derive_builder optional

Cargo.toml

@@ -28,7 +28,7 @@ required-features = ["tfidf", "textrank"]
 
 [dependencies]
 cedarwood = "0.4"
-derive_builder = "0.20.0"
+derive_builder = { version = "0.20.0", optional = true }
 fxhash = "0.2.1"
 lazy_static = "1.0"
 ordered-float = { version = "4.0", optional = true }
@@ -41,8 +41,8 @@ phf_codegen = "0.11"
 [features]
 default = ["default-dict"]
 default-dict = []
-tfidf = ["ordered-float"]
-textrank = ["ordered-float"]
+tfidf = ["dep:ordered-float", "dep:derive_builder"]
+textrank = ["dep:ordered-float", "dep:derive_builder"]
 
 [workspace]
 members = [

src/keywords/mod.rs

@@ -1,3 +1,4 @@
+use derive_builder::Builder;
 use lazy_static::lazy_static;
 use std::collections::BTreeSet;
 

src/lib.rs

@@ -90,10 +90,6 @@ pub use crate::keywords::tfidf::TfIdf;
 #[cfg(any(feature = "tfidf", feature = "textrank"))]
 pub use crate::keywords::{Keyword, KeywordExtract, KeywordExtractConfig, DEFAULT_STOP_WORDS};
 
-#[cfg(any(feature = "tfidf", feature = "textrank"))]
-#[macro_use]
-extern crate derive_builder;
-
 mod errors;
 mod hmm;
 #[cfg(any(feature = "tfidf", feature = "textrank"))]