Use babel instead of ts lib and do only doctests

unused-test-files/ex.ts

@@ -0,0 +1,11 @@
+export const j = 1
+export module A {
+  export const c = 1
+  export const s = 1
+  export interface J {
+    u: number
+  }
+}
+export namespace N {
+  export const d = 1
+}