fix export, add TypeScript test

Author: eli-darkly

index.d.ts

@@ -13,7 +13,7 @@ declare module 'launchdarkly-node-server-sdk-consul' {
   /**
    * Create a feature flag store backed by Consul.
    */
-  export function ConsulFeatureStore(
+  export default function ConsulFeatureStore(
     /**
      * Options for configuring the feature store.
      */

test-types.ts

@@ -1,3 +1,17 @@
 
 // This file exists only so that we can run the TypeScript compiler in the CI build
 // to validate our index.d.ts file.
+
+import ConsulFeatureStore, { LDConsulOptions } from 'launchdarkly-node-server-sdk-consul';
+import { LDLogger } from 'launchdarkly-node-server-sdk';
+
+var emptyOptions: LDConsulOptions = {};
+
+var logger: LDLogger = { error: () => {}, warn: () => {}, info: () => {}, debug: () => {} };
+
+var options: LDConsulOptions = {
+	consulOptions: {},
+	prefix: 'x',
+	cacheTTL: 30,
+	logger: logger
+};