Export more in quicktype-core

src/quicktype-core/index.ts

@@ -32,7 +32,7 @@ export {
     StringInput,
     toString
 } from "./support/Support";
-export { setMap, iterableFirst, mapFromObject } from "./support/Containers";
+export { mapMap, setMap, iterableFirst, mapFromObject } from "./support/Containers";
 export { getStream } from "./get-stream/index";
 export { train as trainMarkovChain } from "./MarkovChain";
 export { QuickTypeError, messageError, messageAssert } from "./Messages";