Vendor dependencies

Let's see how I like this workflow.

vendor/js-sys/tests/wasm/WebAssembly.js

@@ -0,0 +1,45 @@
+const { TextEncoder } = require("util");
+
+const data =
+  "\u0000asm\u0001\u0000\u0000\u0000\u0001\b\u0002`\u0001\u007f\u0000`\u0000" +
+  "\u0000\u0002\u0019\u0001\u0007imports\rimported_func\u0000\u0000\u0003" +
+  "\u0002\u0001\u0001\u0007\u0011\u0001\rexported_func\u0000\u0001\n\b\u0001" +
+  "\u0006\u0000A*\u0010\u0000\u000b";
+
+const encoder = new TextEncoder();
+const wasmArray = encoder.encode(data);
+
+function getWasmArray() {
+  return wasmArray;
+}
+
+function getTableObject() {
+  return { element: "anyfunc", initial: 1 }
+}
+
+function getInvalidTableObject() {
+  return { element: "anyfunc", initial: 1, maximum: 0 }
+}
+
+function getImports() {
+  return {
+    imports: {
+      imported_func: function () {
+        return 1;
+      }
+    }
+  };
+}
+
+// Polyfill `WebAssembly.instantiateStreaming` for node.
+if (!global.WebAssembly.instantiateStreaming) {
+  global.WebAssembly.instantiateStreaming =
+    (response, imports) => response.then(buf => WebAssembly.instantiate(buf, imports));
+}
+
+module.exports = {
+  getInvalidTableObject,
+  getTableObject,
+  getWasmArray,
+  getImports,
+};