fix(generator): Allow zero-length unions (#110)

* Clear up bootstrap warnings

* Update type generator to handle zero-length union types

* Clear up compiler errors surrounding middlewarestack at later steps

* Regenerate SDK packages

Author: jeskew

packages/middleware-stack/src/index.ts

@@ -1,10 +1,14 @@
 import {
+    BuildHandlerOptions,
     FinalizeHandler,
+    FinalizeHandlerOptions,
+    FinalizeMiddleware,
     Handler,
+    HandlerExecutionContext,
     HandlerOptions,
     Middleware,
     MiddlewareStack as IMiddlewareStack,
-    HandlerExecutionContext,
+    SerializeHandlerOptions,
     Step,
 } from '@aws/types';
 
@@ -33,6 +37,26 @@ export class MiddlewareStack<
     private readonly entries: Array<HandlerListEntry<Input, Output, Stream>> = [];
     private sorted: boolean = true;
 
+    add(
+        middleware: Middleware<Input, Output>,
+        options?: HandlerOptions & {step?: 'initialize'}
+    ): void;
+
+    add(
+        middleware: Middleware<Input, Output>,
+        options: SerializeHandlerOptions
+    ): void;
+
+    add(
+        middleware: FinalizeMiddleware<Input, Output, Stream>,
+        options: BuildHandlerOptions
+    ): void;
+
+    add(
+        middleware: FinalizeMiddleware<Input, Output, Stream>,
+        options: FinalizeHandlerOptions
+    ): void;
+
     add(
         middleware: Middleware<Input, Output>,
         options: HandlerOptions = {}

packages/util-body-length-browser/package.json

@@ -20,7 +20,7 @@
     },
     "devDependencies": {
         "@types/jest": "^20.0.4",
-        "jest": "^20.0.3",
+        "jest": "^20.0.4",
         "typescript": "^2.6"
     }
-}
+}

packages/util-body-length-node/package.json

@@ -10,7 +10,7 @@
     "devDependencies": {
         "@types/jest": "^20.0.4",
         "@types/node": ">=4.0.0",
-        "jest": "^20.0.3",
+        "jest": "^20.0.4",
         "typescript": "^2.6"
     },
     "main": "./build/index.js",
@@ -24,4 +24,4 @@
     "dependencies": {
         "tslib": "^1.8.0"
     }
-}
+}