Vendor dependencies

Let's see how I like this workflow.

vendor/wasm-bindgen-macro/ui-tests/invalid-imports.rs

@@ -0,0 +1,41 @@
+use wasm_bindgen::prelude::*;
+
+#[wasm_bindgen]
+extern "C" {
+    type A;
+
+    fn f() -> &'static u32;
+
+    #[wasm_bindgen(method)]
+    fn f1();
+    #[wasm_bindgen(method)]
+    fn f2(x: u32);
+    #[wasm_bindgen(method)]
+    fn f3(x: &&u32);
+    #[wasm_bindgen(method)]
+    fn f4(x: &foo::Bar);
+    #[wasm_bindgen(method)]
+    fn f4(x: &::Bar);
+    #[wasm_bindgen(method)]
+    fn f4(x: &Bar<T>);
+    #[wasm_bindgen(method)]
+    fn f4(x: &Fn(T));
+
+    #[wasm_bindgen(constructor)]
+    fn f();
+    #[wasm_bindgen(constructor)]
+    fn f() -> ::Bar;
+    #[wasm_bindgen(constructor)]
+    fn f() -> &Bar;
+
+    #[wasm_bindgen(catch)]
+    fn f() -> u32;
+    #[wasm_bindgen(catch)]
+    fn f() -> &u32;
+    #[wasm_bindgen(catch)]
+    fn f() -> Result<>;
+    #[wasm_bindgen(catch)]
+    fn f() -> Result<'a>;
+}
+
+fn main() {}