chore(package): update tmp to version 0.2.1

Closes #25

Author: greenkeeper[bot]

package.json

@@ -38,6 +38,6 @@
     "jest": "^24.7.1",
     "sass": "^1.17.0",
     "standard": "^13.0.1",
-    "tmp": "^0.1.0"
+    "tmp": "^0.2.1"
   }
 }