Update dependencies to fix build

package.json

@@ -57,6 +57,7 @@
   "dependencies": {
     "accepts": "^1.3.3",
     "app-module-path": "^2.2.0",
+    "async": "^2.5.0",
     "bcrypt": "^1.0.2",
     "body-parser": "^1.17.1",
     "bowser": "^1.7.0",

plugins/talk-plugin-permalink/yarn.lock

@@ -0,0 +1,4 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+

yarn.lock

@@ -358,6 +358,12 @@ async@^2.0.1, async@^2.1.2, async@^2.1.4:
   dependencies:
     lodash "^4.14.0"
 
+async@^2.5.0:
+  version "2.5.0"
+  resolved "https://registry.yarnpkg.com/async/-/async-2.5.0.tgz#843190fd6b7357a0b9e1c956edddd5ec8462b54d"
+  dependencies:
+    lodash "^4.14.0"
+
 async@~0.9.0:
   version "0.9.2"
   resolved "https://registry.yarnpkg.com/async/-/async-0.9.2.tgz#aea74d5e61c1f899613bf64bda66d4c78f2fd17d"