Test on node 10 (#7908)

* Use node 10 on circle an node 9 on travis

* Update v8flag

.circleci/config.yml

@@ -34,7 +34,7 @@ jobs:
   build:
     working_directory: ~/babel
     docker:
-      - image: circleci/node:9
+      - image: circleci/node:10
     steps:
       - checkout
       - restore-cache: *restore-yarn-cache

.travis.yml

@@ -8,6 +8,7 @@ cache:
     - node_modules
 node_js:
   # We test the latest version on circleci
+  - '9'
   - '8'
   - '6'
 

packages/babel-node/package.json

@@ -22,7 +22,7 @@
     "fs-readdir-recursive": "^1.0.0",
     "lodash": "^4.17.5",
     "output-file-sync": "^2.0.0",
-    "v8flags": "^3.0.0"
+    "v8flags": "^3.1.1"
   },
   "peerDependencies": {
     "@babel/core": "7.0.0-beta.49"