added ahash under feature flag

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "inquisition"
-version = "0.1.0"
+version = "0.0.1"
 authors = ["Lutetium Vanadium"]
 edition = "2018"
 
@@ -11,7 +11,11 @@ members = [
 ]
 
 [dependencies]
-ahash = "0.7.2"
+ahash = { version = "0.7.2", optional = true }
 crossterm = "0.19.0"
 tempfile = "3"
 ui = { path = "./ui" }
+
+[features]
+default = ["fast-hash"]
+fast-hash = ["ahash"]

src/answer.rs

@@ -4,7 +4,10 @@ use std::{
     ops::{Deref, DerefMut},
 };
 
+#[cfg(feature = "fast-hash")]
 use ahash::AHashMap as HashMap;
+#[cfg(not(feature = "fast-hash"))]
+use std::collections::HashMap;
 
 #[derive(Debug, Clone, PartialEq, PartialOrd)]
 pub enum Answer {

src/question/expand.rs

@@ -1,6 +1,10 @@
 use std::fmt;
 
+#[cfg(feature = "fast-hash")]
 use ahash::AHashSet as HashSet;
+#[cfg(not(feature = "fast-hash"))]
+use std::collections::HashSet;
+
 use crossterm::{
     cursor, queue,
     style::{Color, Colorize, ResetColor, SetForegroundColor},