chore(deps): update node:8.16.0 docker digest to 37ecd6c

Author: renovate-bot

.circleci/config.yml

@@ -6,7 +6,7 @@ machine:
 jobs:
   build:
     docker:
-      - image: node:8.16.0@sha256:e97846b0e7b077385ea2145b4073ac7a92253881568ab4fe20b2fdc5b66b4814
+      - image: node:8.16.0@sha256:37ecd6c3ab4857cd1a489ce972de69bd7585e665ba1e524e8d9b5bb36a9981f6
     environment:
       - NPM_CONFIG_LOGLEVEL: warn
     working_directory: ~/repo