Fix TypeScript tests so they fail for errors 😭

[kumar303]

I noticed that the TypeScript tests aren't working. Here's a patch that should trigger a test failure:

diff --git a/index.d.ts b/index.d.ts
index fa84b3e..b788e7c 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -3,7 +3,7 @@ import { Action, ActionCreator, AnyAction, StoreEnhancer, Store } from 'redux';
 export interface StoreCreator {
   <S, A extends Action>(
     reducer: LoopReducer<S, A>,
-    preloadedState: S | undefined,
+    preloadedState?: S | undefined,
     enhancer: StoreEnhancer<S>
   ): Store<S>;
 }

Only after passing the error to done() (which totally isn't documented correctly), I get a test failure:

 FAIL  test/typescript.spec.js
  ● Console

    console.log node_modules/typescript-definition-tester/dist/index.js:28
      Global finished

  ● TypeScript definitions › should compile against index.d.ts

    AssertionError: Semantic: /Users/kumar/tmp/redux-loop/index.d.ts (7,5): A required parameter cannot follow an optional parameter.

      at diagnostics.forEach.diagnostic (node_modules/typescript-definition-tester/dist/index.js:17:15)
          at Array.forEach (<anonymous>)
      at handleDiagnostics (node_modules/typescript-definition-tester/dist/index.js:14:17)
      at compile (node_modules/typescript-definition-tester/dist/index.js:29:9)
      at walk (node_modules/typescript-definition-tester/dist/index.js:63:13)
      at next (node_modules/typescript-definition-tester/dist/index.js:82:24)
      at node_modules/typescript-definition-tester/dist/index.js:95:21

Test Suites: 1 failed, 7 passed, 8 total

There was an error about some usage of Promise which I fixed with some lib configuration. Unfortunately I couldn't find a way to use tsconfig.json directly.

[bdwain]

oof good catch. thanks!