Add new acceptance scenario: 044

❌ 044
  Error:
    × Main thread panicked.
    ├─▶ at crates/aiken-lang/src/uplc.rs:846:89
    ╰─▶ called `Option::unwrap()` on a `None` value

examples/acceptance_tests/044/lib/tests.ak

@@ -0,0 +1,16 @@
+test foo_1() {
+  let a = False
+  when a is {
+    True -> False
+    False -> True
+  }
+}
+
+test foo_2() {
+  let a = False
+  let b = when a is {
+    True -> 14
+    False -> 42
+  }
+  b == 42
+}