chore(deps): update dependency node to v7

Author: renovate[bot]

.circleci/config.yml

@@ -1,6 +1,6 @@
 version: 2.1
 orbs:
-  node: circleci/node@6.3.0
+  node: circleci/node@7.2.1
 
 references:
   executor: &executor