Merge pull request #5 from davidchase/greenkeeper-buba-2.0.3

Update buba to version 2.0.3 🚀

Author: davidchase

package.json

@@ -7,7 +7,7 @@
     "url": "https://github.com/davidchase/path-union/issues"
   },
   "devDependencies": {
-    "buba": "2.0.2",
+    "buba": "2.0.3",
     "rollup-plugin-buble": "0.13.0",
     "tap-spec": "4.1.1",
     "tape": "4.6.0"