Updating NPM dependencies

node_modules/jest-jasmine2/build/expectationResultFactory.js

@@ -37,6 +37,10 @@ function messageFormatter({error, message, passed}) {
     typeof error.message === 'string' &&
     typeof error.name === 'string'
   ) {
+    if (error.message === '') {
+      return error.name;
+    }
+
     return `${error.name}: ${error.message}`;
   }
 
@@ -51,7 +55,7 @@ function stackFormatter(options, initError, errorMessage) {
   }
 
   if (options.error) {
-    if (options.error.stack) {
+    if (typeof options.error.stack === 'string') {
       return options.error.stack;
     }