Update package.json for N-API build

Author: zbjornson

lib/bindings.js

@@ -1,6 +1,6 @@
 'use strict'
 
-const bindings = require('../build/Release/canvas.node')
+const bindings = require('../build/Release/napi-v7/canvas.node')
 
 module.exports = bindings
 

package.json

@@ -37,10 +37,11 @@
   },
   "binary": {
     "module_name": "canvas",
-    "module_path": "build/Release",
+    "module_path": "build/Release/napi-v{napi_build_version}",
     "host": "https://github.com/Automattic/node-canvas/releases/download/",
     "remote_path": "v{version}",
-    "package_name": "{module_name}-v{version}-{node_abi}-{platform}-{libc}-{arch}.tar.gz"
+    "napi_versions": [7],
+    "package_name": "{module_name}-v{napi_build_version}-{platform}-{libc}-{arch}.tar.gz"
   },
   "files": [
     "binding.gyp",