test(ci): update node for webui tests

Co-Authored-By: Hugo Dias <hugomrdias@gmail.com>

.circleci/config.yml

@@ -45,7 +45,7 @@ executors:
       <<: *default_environment
   node-browsers:
     docker:
-      - image: circleci/node:10-browsers
+      - image: circleci/node:12-browsers
     working_directory: ~/ipfs/go-ipfs
     environment:
       <<: *default_environment