chore(deps): update circleci/node:8 docker digest to cc45ae6

Author: renovate-bot

.circleci/config.yml

@@ -6,7 +6,7 @@ machine:
 jobs:
   build:
     docker:
-      - image: circleci/node:8@sha256:f06e9740efbe85a5d663427078f8a710b8162698fd91b1dd87efcdc1894b992c
+      - image: circleci/node:8@sha256:cc45ae6ca2a6ad316c360130c2115e6685aa240c4b23c917d5cd19066d3716d4
       - image: mongo:3.7.9@sha256:736eec20a17eafaa988d299902fcaab521cb0ca56af4400f782576afc878d6bc
     environment:
       - NPM_CONFIG_LOGLEVEL: warn