chore(deps): update circleci/node:8 docker digest to dc2c2da

Author: renovate-bot

.circleci/config.yml

@@ -6,7 +6,7 @@ machine:
 jobs:
   build:
     docker:
-      - image: circleci/node:8@sha256:8dc1d8ae2f295930fa165c36caab3c70cd8bee03c31f1205e1c45dfcdac68109
+      - image: circleci/node:8@sha256:dc2c2da84421fcd1d0e31a1feb156a886309e631638314e30b7da97f76eaff37
     environment:
       - NPM_CONFIG_LOGLEVEL: warn
     working_directory: ~/repo