use files section in package.json (googleapis#147)

Author: ofrobots

.npmignore

@@ -52,6 +52,13 @@
  "typedoc": "^0.5.10",
  "typescript": "^2.3.4"
  },
+ "files": [
+ "LICENSE",
+ "README.md",
+ "lib/**/*.js",
+ "package.json",
+ "types/lib"
+ ],
  "scripts": {
  "check-format": "gulp test.check-format",
  "format": "gulp format",