Remove .travis.yml

TravisCI changed their business model recently and I realized it is
better to not rely on free cloud services. I am now using a Drone.io
instance on my own infrastructure.

.travis.yml

@@ -1,11 +0,0 @@
-language: node_js
-node_js:
-  - 10
-  - 12
-  - 14
-script: npm run build
-os: linux
-arch: arm64-graviton2
-dist: focal
-
-# vim: ts=2 sw=2 et

README.md

@@ -1,4 +1,4 @@
-# Hugo Bootstrap v4 Blog [![Build Status](https://travis-ci.com/alanorth/hugo-theme-bootstrap4-blog.svg?branch=master)](https://travis-ci.org/alanorth/hugo-theme-bootstrap4-blog) [![builds.sr.ht status](https://builds.sr.ht/~alanorth/hugo-theme-bootstrap4-blog.svg)](https://builds.sr.ht/~alanorth/hugo-theme-bootstrap4-blog?)
+# Hugo Bootstrap v4 Blog [![Build Status](https://ci.mjanja.ch/api/badges/alanorth/hugo-theme-bootstrap4-blog/status.svg)](https://ci.mjanja.ch/alanorth/hugo-theme-bootstrap4-blog) [![builds.sr.ht status](https://builds.sr.ht/~alanorth/hugo-theme-bootstrap4-blog.svg)](https://builds.sr.ht/~alanorth/hugo-theme-bootstrap4-blog?)
 A simple but opinionated [Hugo](https://gohugo.io) theme geared towards blog-style content. Based on the older two-column [Bootstrap blog example](https://v4-alpha.getbootstrap.com/examples/blog/) that was used for several Bootstrap versions, but has now been retired in favor of a "snarky" (their words) new example as of version [4.0.0's final release](https://blog.getbootstrap.com/2018/01/18/bootstrap-4/).
 
 ![Screenshot](https://raw.githubusercontent.com/alanorth/hugo-theme-bootstrap4-blog/master/screenshot.png "Screenshot")