Bump Node.js version requirement

.travis.yml

@@ -1,22 +1,13 @@
 language: node_js
 node_js:
-- '0.10'
-- '0.12'
-- iojs
-- v4
-- v5
-- v6
+- v8
+- v10
 - node
-sudo: false
-
-cache:
-  directories:
-  - node_modules
-
+cache: npm
 deploy:
   provider: npm
   email: [email protected]
-  api_key: "$NPM_TOKEN"
+  api-key: $NPM_TOKEN
   on:
     tags: true
     repo: oncletom/crx

README.md

@@ -10,7 +10,7 @@ Packages are available to use `crx` with:
 
 Massive hat tip to the [node-rsa project](https://npmjs.com/node-rsa) for the pure JavaScript encryption!
 
-**Compatibility**: this extension is compatible with `node>=0.10`.
+**Compatibility**: this extension is compatible with `node>=6`.
 
 ## Install
 
@@ -20,7 +20,7 @@ $ npm install crx
 
 ## Module API
 
-Asynchronous functions returns an [ES6 Promise](https://github.com/jakearchibald/es6-promise).
+Asynchronous functions returns a native ECMAScript Promise.
 
 ```js
 const fs = require("fs");

appveyor.yml

@@ -2,11 +2,9 @@ image: Visual Studio 2017
 
 environment:
   matrix:
-  - nodejs_version: "0.10"
-  - nodejs_version: "0.12"
-  - nodejs_version: "4"
   - nodejs_version: "6"
   - nodejs_version: "8"
+  - nodejs_version: "10"
 
 install:
   - ps: Install-Product node $env:nodejs_version x64

bin/crx.js

@@ -3,7 +3,6 @@
 var path = require("path");
 var fs = require("fs");
 var rsa = require('node-rsa');
-var Promise = require('es6-promise').Promise;
 
 var program = require("commander");
 var ChromeExtension = require("..");