bump node versions

Author: ismail-syed

.circleci/config.yml

@@ -3,19 +3,19 @@ jobs:
   build:
     working_directory: ~/app
     docker:
-      - image: circleci/node:8.9.4
+      - image: circleci/node:8.10.0
     steps:
       - checkout
       - restore_cache:
-         keys:
+          keys:
             # Find a cache corresponding to this specific package.json checksum
             # when this file is changed, this key will fail
             - v1-npm-deps-{{ arch }}-{{ checksum "yarn.lock" }}
             # Find the most recent cache used from any branch
             - v1-npm-deps-{{ arch }} # used if above checksum fails
       - run: yarn
       - save_cache:
-         key: v1-npm-deps-{{ arch }}-{{ checksum "yarn.lock" }}
-         paths:
-           - node_modules
+          key: v1-npm-deps-{{ arch }}-{{ checksum "yarn.lock" }}
+          paths:
+            - node_modules
       - run: yarn run check

package.json

@@ -13,7 +13,7 @@
     "test": "tape plugins/**/*.test.js"
   },
   "engines": {
-    "node": ">=8.9.0"
+    "node": ">=8.10.0"
   },
   "keywords": [
     "stylelint",