chore(package): update buble to version 0.19.4

greenkeeper[bot] · greenkeeper[bot] · commit 08b133b00cb0 · 2018-10-06T19:42:37.000Z
Closes #70
diff --git a/package.json b/package.json
@@ -49,7 +49,7 @@
     "winston": "2.3.1"
   },
   "devDependencies": {
-    "buble": "0.15.2",
+    "buble": "0.19.4",
     "dependency-check": "2.9.1",
     "doctoc": "1.3.0",
     "eslint": "4.5.0",
