Lodash stopped exporting a concat method.

@@ -500,7 +500,7 @@ module.exports = function (grunt) {
                     replace: false,
                     replace: false,
                     template: template,
                     template: template,
                     templateOptions: templateOptions,
                     templateOptions: templateOptions,
-                    files: _.concat([], src, specs),
+                    files: [].concat(src, specs),
                 };
                 };
                 template = require('grunt-template-jasmine-istanbul');
                 template = require('grunt-template-jasmine-istanbul');
             }
             }
@@ -510,7 +510,7 @@ module.exports = function (grunt) {
                     templateOptions: templateOptions,
                     templateOptions: templateOptions,
                 },
                 },
                 all: {
                 all: {
-                    src: _.concat([],
+                    src: [].concat(
                         src,
                         src,
                         specs
                         specs
                     ),
                     ),