chore(package): update tmp to version 0.2.1

Closes #35

Author: greenkeeper[bot]

package.json

@@ -34,7 +34,7 @@
     "lodash.assign": "^4.2.0",
     "nyc": "^15.0.0",
     "perjury": "^1.1.4",
-    "tmp": "0.1.0"
+    "tmp": "0.2.1"
   },
   "engine": {
     "node": ">=8.0"