Travis speed-up

Author: philwareham

.travis.yml

@@ -4,3 +4,6 @@ language: node_js
 node_js:
   - "10"
 sudo: false
+cache:
+  directories:
+  - "$HOME/.npm"

README.md

@@ -1,7 +1,7 @@
 # Textpattern.com website
 
-[![Greenkeeper badge](https://badges.greenkeeper.io/textpattern/textpattern-com-website.svg)](https://greenkeeper.io/)
-[![Build Status](https://img.shields.io/travis/textpattern/textpattern-com-website.svg)](https://travis-ci.org/textpattern/textpattern-com-website)
+[![Greenkeeper](https://badges.greenkeeper.io/textpattern/textpattern-com-website.svg)](https://greenkeeper.io/)
+[![Build Status](https://travis-ci.org/textpattern/textpattern-com-website.svg)](https://travis-ci.org/textpattern/textpattern-com-website)
 
 Official 2017+ website of the [Textpattern](https://textpattern.com/) project. **Requires Textpattern 4.7.2 or later.**