Add acceptance test 111

Seems like nested tuples are inferred wrongly when type-casted.

  ```
  type mismatch
     Expected (list a)
          Got integer
  ```

examples/acceptance_tests/111/lib/foo.ak

@@ -0,0 +1,16 @@
+type Point =
+  (ByteArray, Int)
+
+type NestedTuples {
+  points: (Point, Point),
+}
+
+test boom() {
+  let original = NestedTuples { points: (("", 14), ("foo", 42)) }
+
+  let data: Data = original
+
+  expect recovered: NestedTuples = data
+
+  original == recovered
+}