Update README on how to run tests

Issues Dgraph Clients
,
1

Moved from GitHub dgraph-js/54

Posted by danielmai:

I tried npm test but it says I need yarn these days, so I had to install yarn first.

2

danielmai commented :

This is what worked for me, though I don’t know if that’s the official way:

yarn
yarn test
3

prashant-shahi commented :

npm test and npm run test works now.