ci: Add GitHub Actions (#46)

.github/workflows/ci.yml

@@ -0,0 +1,24 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+  schedule:
+    - cron: '0 12 * * *'
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        compiler:
+          - gcc
+          - clang
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: deps
+        run: sudo apt install -y libgl-dev libx11-dev
+      - name: build
+        run: make CC=${{ matrix.compiler }}

README.md

@@ -1,16 +1,16 @@
 screenfetch-c
 =============
 
-[![Build Status](https://drone.io/github.com/woodruffw/screenfetch-c/status.png)](https://drone.io/github.com/woodruffw/screenfetch-c/latest)
+[![Build Status](https://img.shields.io/github/workflow/status/woodruffw/screenfetch-c/CI/master)](https://github.com/woodruffw/screenfetch-c/actions?query=workflow%3ACI)
 
 ## Current Version: 1.6 (release)
 
 screenfetch-c is an attempt to rewrite screenFetch, a popular shell
 script that displays system information and an ASCII logo, in the C
 language.
-Like the original screenFetch, screenfetch-c is meant to be compatible with a number of systems, including *BSD, Solaris, GNU/Linux, OS X, and Windows.
+Like the original screenFetch, screenfetch-c is meant to be compatible with a number of systems, including the BSDs, Solaris, GNU/Linux, OS X, and Windows.
 
-## Installing screenfetch-c:
+## Installing screenfetch-c
 
 ### Dependencies:
 screenfetch-c only relies on libraries that come on virtually every system.