chore(package): update buba to version 2.0.2

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -7,7 +7,7 @@
     "url": "https://github.com/davidchase/path-union/issues"
   },
   "devDependencies": {
-    "buba": "2.0.1",
+    "buba": "2.0.2",
     "rollup-plugin-buble": "0.12.1",
     "tap-spec": "4.1.1",
     "tape": "4.6.0"