Update hashicorp/terraform Docker tag to v0.13.5 (#33)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

.circleci/config.yml

@@ -2,7 +2,7 @@ version: "2"
 jobs:
   build:
     docker:
-      - image: hashicorp/terraform:0.13.3
+      - image: hashicorp/terraform:0.13.5
     steps:
       - checkout
       - run: apk add make