Merge pull request #160 from atom/upgrade-prebuild

bump prebuild to latest version

Author: shiftkey

package-lock.json

@@ -48,7 +48,7 @@
     "node-abi": "^2.7.0",
     "node-cpplint": "~0.4.0",
     "node-gyp": "^3.8.0",
-    "prebuild": "^8.0.1"
+    "prebuild": "^8.1.2"
   },
   "dependencies": {
     "nan": "2.8.0",