Update npm token
Update npm token

Due to an incident, npm have invalidated all existing npm tokens published before 2018-07-12 12:30 UTC – https://status.npmjs.org/incidents/dn7c1fgrr7ng

This updates the encrypted npm token which we use to release the govuk-elements-sass package to use a new token with read and publish rights, which belongs to the alphagov user.

alphagov/govuk_elements,alphagov/govuk_elements,alphagov/govuk_elements,alphagov/govuk_elements