Merge pull request #1400 from mozilla/task/update-engines

task: update engines in package.json and README to clarify that node 10x is expected.

README.md

@@ -30,7 +30,7 @@ A file sharing experiment which allows you to send encrypted files to other user
 
 ## Requirements
 
-- [Node.js 10.0+](https://nodejs.org/)
+- [Node.js 10.x](https://nodejs.org/)
 - [Redis server](https://redis.io/) (optional for development)
 - [AWS S3](https://aws.amazon.com/s3/) or compatible service. (optional)
 

package.json

@@ -58,7 +58,7 @@
     "cache": true
   },
   "engines": {
-    "node": ">=10.0.0"
+    "node": ">=10.0.0 <11.0.0"
   },
   "devDependencies": {
     "@babel/core": "^7.6.0",