fix: release eq

src/env.rs

@@ -1,7 +1,6 @@
 use core::fmt::Debug;
 use std::rc::Rc;
 
-use ecow::EcoString;
 use hashbrown::HashMap;
 
 use crate::error::Result;
@@ -10,7 +9,7 @@ use crate::ty::internal::Value;
 #[derive(Clone, Debug)]
 pub struct Env {
     cache: Vec<HashMap<usize, Value>>,
-    with: Vec<Rc<HashMap<EcoString, Value>>>,
+    with: Vec<Rc<HashMap<String, Value>>>,
     args: Vec<Value>,
 }
 
@@ -106,7 +105,7 @@ impl Env {
         self.with.pop();
     }
 
-    pub fn enter_with(&mut self, map: Rc<HashMap<EcoString, Value>>) {
+    pub fn enter_with(&mut self, map: Rc<HashMap<String, Value>>) {
         self.with.push(map)
     }
 }