Dependency update + version bump

Author: mnemnion

README.md

@@ -15,7 +15,7 @@ Let me show you its features!
 The best way to use `ohsnap` is to install it using the [Zig Build System](https://ziglang.org/learn/build-system/).  From your project repo root, use `zig fetch` like this:
 
 ```sh
-zig fetch --save "https://github.com/mnemnion/ohsnap/archive/refs/tags/v0.2.0.tar.gz"
+zig fetch --save "https://github.com/mnemnion/ohsnap/archive/refs/tags/v0.2.1.tar.gz"
 ```
 
 Then add it to your test artifact like so:

build.zig.zon

@@ -10,7 +10,7 @@
 
     // This is a [Semantic Version](https://semver.org/).
     // In a future version of Zig it will be used for package deduplication.
-    .version = "0.1.1",
+    .version = "0.2.1",
 
     // This field is optional.
     // This is currently advisory only; Zig does not yet do anything
@@ -29,8 +29,8 @@
             .hash = "12201325c0651a8cc167d1d3bd07a71aa3b87b91065d45a64298a3e1d5716d62ed85",
         },
         .diffz = .{
-            .url = "https://github.com/mnemnion/diffz/archive/refs/tags/v0.0.3-rc3.tar.gz",
-            .hash = "1220a91fd3627573ebe98147798a1f7b1476ba6a8a74864520afb5e782c79308b94e",
+            .url = "https://github.com/mnemnion/diffz/archive/refs/tags/v0.0.4-rc1.tar.gz",
+            .hash = "1220806da7bb203c300e373429c915bd6c2a80dde3371b3cfceba6fb091b6fe1b28d",
         },
         .mvzr = .{
             .url = "https://github.com/mnemnion/mvzr/archive/refs/tags/v0.1.2.tar.gz",