Upgrade node-gyp devDependency from ^5.0.0 to ^6.0.0 (#677)

greenkeeper[bot] · vweevers · commit a78360fce64f · 2019-10-04T18:23:02.000+03:00
diff --git a/package.json b/package.json
@@ -44,7 +44,7 @@
     "level-community": "^3.0.0",
     "level-concat-iterator": "^2.0.0",
     "mkfiletree": "^2.0.0",
-    "node-gyp": "^5.0.0",
+    "node-gyp": "^6.0.0",
     "nyc": "^14.0.0",
     "prebuildify": "^3.0.0",
     "prebuildify-ci": "^1.0.4",
