[Dev Deps] update falafel, js-yaml

Author: ljharb

package.json

@@ -25,8 +25,8 @@
   },
   "devDependencies": {
     "concat-stream": "~1.6.0",
-    "falafel": "~2.0.0",
-    "js-yaml": "~3.8.0",
+    "falafel": "~2.1.0",
+    "js-yaml": "~3.8.4",
     "tap": "~8.0.1",
     "tap-parser": "~3.0.4"
   },