feat(async): add initial implementation

Closes #830

src/async.js

@@ -0,0 +1,28 @@
+import { curryN, bind } from 'ramda';
+
+import resolveP from './resolveP';
+import rejectP from './rejectP';
+
+const async = generatorFn =>
+  curryN(generatorFn.length, function asyncWrapper(...args) {
+    const iterator = bind(generatorFn, this)(...args);
+
+    const handle = result => {
+      const resolved = resolveP(result.value);
+
+      return result.done
+        ? resolved
+        : resolved.then(
+            value => handle(iterator.next(value)),
+            error => handle(iterator.throw(error))
+          );
+    };
+
+    try {
+      return handle(iterator.next());
+    } catch (error) {
+      return rejectP(error);
+    }
+  });
+
+export default async;