Install async module

app/package-lock.json

@@ -238,9 +238,12 @@
       "integrity": "sha1-104bh+ev/A24qttwIfP+SBAasjQ="
     },
     "async": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/async/-/async-1.0.0.tgz",
-      "integrity": "sha1-+PwEyjoTeErenhZBr5hXjPvWR6k="
+      "version": "2.6.0",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.0.tgz",
+      "integrity": "sha512-xAfGg1/NTLBBKlHFmnd7PlmUW9KhVQIUuSrYem9xzFUZy13ScvtyGGejaae9iAVRiRq9+Cx7DPFaAAhCpyxyPw==",
+      "requires": {
+        "lodash": "4.17.4"
+      }
     },
     "asynckit": {
       "version": "0.4.0",
@@ -2556,6 +2559,11 @@
         }
       }
     },
+    "lodash": {
+      "version": "4.17.4",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz",
+      "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4="
+    },
     "lodash._arraycopy": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/lodash._arraycopy/-/lodash._arraycopy-3.0.0.tgz",
@@ -6598,6 +6606,13 @@
         "eyes": "0.1.8",
         "isstream": "0.1.2",
         "stack-trace": "0.0.10"
+      },
+      "dependencies": {
+        "async": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.0.0.tgz",
+          "integrity": "sha1-+PwEyjoTeErenhZBr5hXjPvWR6k="
+        }
       }
     },
     "wordwrap": {

app/package.json

@@ -31,6 +31,7 @@
     "gulp-less": "^3.3.0"
   },
   "dependencies": {
+    "async": "^2.6.0",
     "electron": "^1.8.1",
     "humanize-duration": "^3.10.0",
     "moment": "^2.17.1",