SDK Requirements for v0.3

Signed-off-by: Fabio José <fabiojose@gmail.com>

v03/index.js

@@ -0,0 +1,11 @@
+const Cloudevent = require("../lib/cloudevent.js");
+const Spec = require("../lib/specs/spec_0_3.js");
+
+function event() {
+  return new Cloudevent(Spec);
+}
+
+module.exports = {
+  Spec,
+  event
+};