FIXED: Compilation errors due to changed type descriptions.

Author: balassy

src/health/health.controller.spec.ts

@@ -68,7 +68,7 @@ describe('HealthController', () => {
           };
         }
 
-        handler(event, <ApiContext> {}, (error?: Error | null, result?: ApiResponse): void => {
+        handler(event, <ApiContext> {}, (error?: Error | null | string, result?: ApiResponse): void => {
           if (typeof result === 'undefined') {
             reject('No result was returned by the handler!');
             return;

test/index.ts

@@ -13,7 +13,7 @@ export const callSuccess: SuccessCaller = <T>(handler: ApiHandler, pathParameter
       event.pathParameters = pathParameters;
     }
 
-    handler(event, <ApiContext> {}, (error?: Error | null, result?: ApiResponse): void => {
+    handler(event, <ApiContext> {}, (error?: Error | null | string, result?: ApiResponse): void => {
       if (typeof result === 'undefined') {
         reject('No result was returned by the handler!');
         return;
@@ -35,7 +35,7 @@ export const callFailure: FailureCaller = (handler: ApiHandler, pathParameters?:
       event.pathParameters = pathParameters;
     }
 
-    handler(event, <ApiContext> {}, (error?: Error | null, result?: ApiResponse): void => {
+    handler(event, <ApiContext> {}, (error?: Error | null | string, result?: ApiResponse): void => {
       if (typeof result === 'undefined') {
         reject('No result was returned by the handler!');
         return;