Remove dependency on "extend" (#21)

* Remove dependency on "extend"

* Update changelog

Author: davidpdrsn

CHANGELOG.md

@@ -8,6 +8,7 @@ for Rust libraries in [RFC #1105](https://github.com/rust-lang/rfcs/blob/master/
 
 - A less strict numeric mode for comparisons is now supported. The `AssumeFloat` mode will make `1 == 1.0`. This mode can be set via `Config::numeric_mode`.
 - A panicking `assert_json_matches` macro has been added which takes a `Config`.
+- Remove dependency on "extend".
 
 ### Breaking changes
 

Cargo.toml

@@ -13,10 +13,9 @@ documentation = "https://docs.rs/assert-json-diff"
 edition = "2018"
 
 [dependencies]
-serde_json = "1.0.32"
-serde = "1.0.80"
-extend = "0.1.0"
+serde_json = "1"
+serde = "1"
 
 [dev-dependencies]
 version-sync = "0.8"
-serde = { version = "1.0.80", features = ["derive"] }
+serde = { version = "1", features = ["derive"] }

src/core_ext.rs

@@ -1,7 +1,8 @@
-use extend::ext;
+pub trait Indent {
+    fn indent(&self, level: u32) -> String;
+}
 
-#[ext(pub(crate), name = Indent)]
-impl<T> T
+impl<T> Indent for T
 where
     T: ToString,
 {
@@ -19,8 +20,11 @@ where
     }
 }
 
-#[ext(pub(crate), name = Indexes)]
-impl<T> Vec<T> {
+pub trait Indexes {
+    fn indexes(&self) -> Vec<usize>;
+}
+
+impl<T> Indexes for Vec<T> {
     fn indexes(&self) -> Vec<usize> {
         if self.is_empty() {
             vec![]