Install govuk_seed_crawler 2.1.0
Install govuk_seed_crawler 2.1.0

This is the latest version of the crawler as of
https://github.com/alphagov/govuk_seed_crawler/pull/8.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet