Add support for terragrunt 0.12.31
Multi loan performance hydra report requires terraform 0.12.31
https://git.iwoca.co.uk/iwoca/reporting-systems/hydra/reports/loan_performance_multi/-/jobs/10074828
Multi loan performance hydra report requires terraform 0.12.31
https://git.iwoca.co.uk/iwoca/reporting-systems/hydra/reports/loan_performance_multi/-/jobs/10074828