Update mongoose/connect-mongo to latest to deploy Heroku

[yoshiokatsuneo]

On default package.json, heroku deployment fails.
Just updating mongoose/connect-mongo package solves the issue for Heroku deployment.
Could you please update package versions on package.json below ?
generator-angular-fullstack/app/templates/_package.json
"connect-mongo": "^0.8.1"
"mongoose": "~4.0.3"

[yoshiokatsuneo]

I created the Pull Request.
#1017