Vendor dependencies

Let's see how I like this workflow.

vendor/wasm-bindgen/tests/wasm/final.js

@@ -0,0 +1,25 @@
+const assert = require('assert');
+
+exports.MyType = class {
+  static foo(y) {
+    assert.equal(y, 'x');
+    return y + 'y';
+  }
+
+  constructor(x) {
+    assert.equal(x, 2);
+    this._a = 1;
+  }
+
+  bar(x) {
+    assert.equal(x, true);
+    return 3.2;
+  }
+
+  get a() {
+    return this._a;
+  }
+  set a(v) {
+    this._a = v;
+  }
+};