Vendor dependencies

Let's see how I like this workflow.

vendor/wasm-bindgen/tests/wasm/usize.rs

@@ -0,0 +1,79 @@
+use wasm_bindgen::prelude::*;
+use wasm_bindgen_test::*;
+
+#[wasm_bindgen(module = "tests/wasm/usize.js")]
+extern "C" {
+    fn isize_js_identity(a: isize) -> isize;
+    fn usize_js_identity(a: usize) -> usize;
+    fn js_works();
+}
+
+#[wasm_bindgen]
+pub fn usize_zero() -> usize {
+    0
+}
+
+#[wasm_bindgen]
+pub fn usize_one() -> usize {
+    1
+}
+
+#[wasm_bindgen]
+pub fn isize_neg_one() -> isize {
+    -1
+}
+
+#[wasm_bindgen]
+pub fn isize_i32_min() -> isize {
+    i32::min_value() as isize
+}
+
+#[wasm_bindgen]
+pub fn usize_u32_max() -> usize {
+    u32::max_value() as usize
+}
+
+#[wasm_bindgen]
+pub fn isize_min() -> isize {
+    isize::min_value()
+}
+
+#[wasm_bindgen]
+pub fn usize_max() -> usize {
+    usize::max_value()
+}
+
+#[wasm_bindgen]
+pub fn isize_rust_identity(a: isize) -> isize {
+    isize_js_identity(a)
+}
+
+#[wasm_bindgen]
+pub fn usize_rust_identity(a: usize) -> usize {
+    usize_js_identity(a)
+}
+
+#[wasm_bindgen]
+pub fn isize_slice(a: &[isize]) -> Vec<isize> {
+    a.to_vec()
+}
+
+#[wasm_bindgen]
+pub fn usize_slice(a: &[usize]) -> Vec<usize> {
+    a.to_vec()
+}
+
+#[wasm_bindgen]
+pub async fn async_usize_one() -> usize {
+    1
+}
+
+#[wasm_bindgen]
+pub async fn async_isize_neg_one() -> isize {
+    -1
+}
+
+#[wasm_bindgen_test]
+fn works() {
+    js_works();
+}