feat: add support for universal binary (#11)

justfile: add `--arch` to build universal binary

Author: exurd

justfile

@@ -6,7 +6,7 @@ default:
 build mode="debug":
     xcrun coremlcompiler generate Resources/TeemojiClassifier.mlpackage Sources --language Swift
     xcrun coremlcompiler compile Resources/TeemojiClassifier.mlpackage Sources
-    swift build --configuration {{mode}} --verbose --disable-sandbox
+    swift build --configuration {{mode}} --verbose --disable-sandbox --arch arm64 --arch x86_64
 
 test: (build "debug")
     swift test