Use latest Zig in CI

Author: kubkon

.github/workflows/main.yml

@@ -13,9 +13,9 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
-    - uses: mlugg/setup-zig@v1
+    - uses: mlugg/setup-zig@v2
       with:
-        version: 0.14.0
+        version: master
     - run: zig version
     - run: zig fmt --check src 
     - run: zig build test -Dhas-zig -Dhas-objc-msgsend-stubs --summary all

README.md

@@ -44,7 +44,7 @@ tl;dr `bold` is currently directly competing with LLVM lld but behind the Apple
 
 ### Building
 
-You will need Zig 0.14.0 in your path. You can download it from [here](https://ziglang.org/download/).
+You will need nightly Zig in your path. You can download it from [here](https://ziglang.org/download/).
 
 ```
 $ zig build -Doptimize=ReleaseFast