Update npm package

[dcn0503]

First off, thanks to all contributors for creating and maintaining this adapter!

I am getting the this.adapter.isFiltered bug, using version v1.1.11, which is the most recent version on npm. Could you update the npm package to include the recent changes to the codebase?

[hsluoyz]

@dcn0503 that issue (#6) is fixed by PR: #10

@juicycleff can you help make a new npmjs release?

[juicycleff]

@hsluoyz thanks for the PR. Are you reading my mind, I just pulled and want to make a release

[juicycleff]

@hsluoyz I made a release with some small improvements

[hsluoyz]

lol, that's really coincidental!

I saw v1.2.0 is released: https://www.npmjs.com/package/casbin-mongodb-adapter/v/1.2.0

Thanks!

[dcn0503]

Convenient timing - thank you @juicycleff @hsluoyz!