basic-auth: Make auth return value optional

types/basic-auth/basic-auth-tests.ts

@@ -1,4 +1,7 @@
-
+import {IncomingMessage} from 'http';
 import auth = require('basic-auth');
 
-auth(null);
+const loginData = auth(undefined! as IncomingMessage);
+if (loginData) {
+    const {name, pass} = loginData;
+}

types/basic-auth/index.d.ts

@@ -7,7 +7,8 @@
 
 import * as http from 'http';
 
-declare function auth(req: http.IncomingMessage): auth.BasicAuthResult;
+// See https://github.com/jshttp/basic-auth/blob/v1.1.0/index.js#L49
+declare function auth(req: http.IncomingMessage): auth.BasicAuthResult | undefined;
 
 declare namespace auth {
     interface BasicAuthResult {

types/basic-auth/tsconfig.json

@@ -6,7 +6,7 @@
         ],
         "noImplicitAny": true,
         "noImplicitThis": true,
-        "strictNullChecks": false,
+        "strictNullChecks": true,
         "baseUrl": "../",
         "typeRoots": [
             "../"