Add a github action CI.

.github/workflows/ci.yml

@@ -0,0 +1,14 @@
+name: CI
+on: [push,pull_request]
+jobs:
+  strategy:
+    matrix:
+      compiler: [gcc, clang]
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: install dependencies
+        run: sudo apt-get install -y libgl1-mesa-dev freeglut3-dev ${{ matrix.compiler }}
+      - name: build
+        run: scons

README.md

@@ -1,7 +1,7 @@
 glsnake
 -------
 
-[![Travis Build Status](https://travis-ci.org/jaqx0r/glsnake.svg?branch=master)](https://travis-ci.org/jaqx0r/glsnake)
+![ci](https://github.com/jaqx0r/glsnake/workflows/CI/badge.svg)
 
 glsnake has been dubbed a "hardware accelerated executive stress toy" by its
 fans.  It merely provides a virtual Rubiks' Snake toy for the user to play