NTLM support in mssql

**Is your feature request related to a problem? Please describe.**
Most production implementations of SQL Server today use windows authentication aka NTLM. Today the support for it is missing in cube.js although the underlying tedious library supports it.

**Describe the solution you'd like**
An ability to set the authentication type in .env file which is used in MSSqlDriver.js appropriately.
CUBEJS_DB_AUTHTYPE=takes options supported by tedious e.g. default, ntlm. Below I have used hardcoding as variables did not give the right behaviour and that is what needs solving.

> class MSSqlDriver extends BaseDriver {
> constructor(config) {
> super();
> this.config = {
> server: process.env.CUBEJS_DB_HOST,
> database: process.env.CUBEJS_DB_NAME,
> port: process.env.CUBEJS_DB_PORT && parseInt(process.env.CUBEJS_DB_PORT, 10),
> user: process.env.CUBEJS_DB_USER,
> authentication: {
> type: 'ntlm',
> options: {
> userName: 'hardcodedusername',
> password: 'hardcodedpassword',
> domain: 'hardcodeddomain'
> }
> },

**Describe alternatives you've considered**
This has been the only way I have been able to get ntlm working.

**Additional context**
I am not a javascript developer and will probably break something. So I thought it better to share the way I managed to get it working.