Use Node.js version 10

Update instructions, Dockerfile and Travis CI to use Node.js 10.
Specify that Node.js version 10 or greater is needed in the engines
section of package.json (note that this is only advisory.)  And document
this as a breaking change in CHANGELOG.md.

.travis.yml

@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-  - "9"
+  - 10
 before_install:
   - curl -o factorio.tar.gz -L https://www.factorio.com/get-download/latest/headless/linux64
   - tar -xf factorio.tar.gz

CHANGELOG.md

@@ -0,0 +1,6 @@
+Version 2.0.0
+=============
+
+Breaking Changes
+----------------
+- Node.js versions below 10 are no longer supported.

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:9.11.2
+FROM node:10
 RUN apt-get update && apt install git curl tar -y
 RUN mkdir factorioClusterio
 

README.md

@@ -88,7 +88,7 @@ NodeJS does not support EOL ubuntu releases. Make sure you are on the most recen
 
 Master and all slaves:
 
-    sudo curl -sL https://deb.nodesource.com/setup_9.x | sudo -E bash -
+    sudo curl -sL https://deb.nodesource.com/setup_10.x | sudo -E bash -
     sudo apt install -y nodejs python-dev git wget curl tar build-essential
     sudo npm install pm2 -g
     git clone https://github.com/clusterio/factorioClusterio.git
@@ -159,7 +159,7 @@ Game Client = The people connecting to the server
 
 **Requirements**
 
-download and install nodeJS 8 or 9 from http://nodejs.org
+download and install nodeJS 10 from http://nodejs.org
 
 download and install git from https://git-scm.com/
 

package.json

@@ -17,6 +17,9 @@
   ],
   "author": "Danielv123",
   "license": "ISC",
+  "engines": {
+    "node": ">=10"
+  },
   "dependencies": {
     "as-table": "^1.0.31",
     "averaged-timeseries": "^1.4.0",