1.3.1 - npm rebuild/repack for significant file size savings

don't use node-gyp that comes bundled with node
  ./node_modules/.bin/node-gyp rebuild --release
reduced compiled library from 500kb to 94kb.

Author: xori

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "set-sparse",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "description": "A simple function that sets the FSCTL_SET_SPARSE Windows flag to save space in sparse files.",
   "main": "./src/index.js",
   "scripts": {