Migrate from Travis-CI to GitHub Actions

.github/workflows/main.yml

@@ -0,0 +1,29 @@
+name: build
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: build and install cc65 components
+        run: |
+          git clone https://github.com/cc65/cc65 /tmp/cc65
+          sudo make -C /tmp/cc65 ca65 ld65 avail
+          ca65 --version
+
+      - name: build
+        env:
+          TERM: xterm-256color
+        run: |
+          make

.travis.yml

@@ -1,11 +0,0 @@
-sudo: enabled
-os: linux
-language: c
-
-install:
-- git clone https://github.com/cc65/cc65 /tmp/cc65 &&
-  sudo make -C /tmp/cc65 ca65 ld65 avail &&
-  ca65 --version
-
-script:
-  - make

README.md

@@ -1,6 +1,8 @@
 # ProDOS Drivers
 
-[![Build Status](https://travis-ci.com/a2stuff/prodos-drivers.svg?branch=master)](https://travis-ci.com/a2stuff/prodos-drivers)
+[![build](https://github.com/a2stuff/prodos-drivers/actions/workflows/main.yml/badge.svg)](https://github.com/a2stuff/prodos-drivers/actions/workflows/main.yml)
+
+Build with [ca65](https://cc65.github.io/doc/ca65.html)
 
 # What are ProDOS "drivers"?