Correct minimal version of cc required

shepmaster · shepmaster · commit 110ec84c0dd8 · 2025-04-04T10:28:10.000-04:00
This is the first version that includes the `cflags_env` method used.
diff --git a/libffi-sys-rs/Cargo.toml b/libffi-sys-rs/Cargo.toml
@@ -19,4 +19,4 @@ complex = []
 features = ["system"]
 
 [build-dependencies]
-cc = "1.0"
+cc = "1.0.3"
