Update Cargo.toml to allow tests to build (#208)

cli/tauri-cli/Cargo.toml

@@ -1,3 +1,5 @@
+workspace = {}
+
 [package]
 name = "tauri-cli"
 version = "0.1.2"
@@ -50,4 +52,4 @@ path = "src/main.rs"
 [features]
 appimage = []
 ios = []
-dmg = []
+dmg = []