Low the branch coverage to 70%

gulpfile.babel.js

@@ -81,7 +81,7 @@ gulp.task('test', ['pre-test'], () => {
         thresholds: {
             global: {
                 statements: 80,
-                branches: 75,
+                branches: 70,
                 lines: 80,
                 functions: 80
             }