Migrate CI from Travis to GitHub Actions

Author: realityone

.github/workflows/ci.yml

@@ -0,0 +1,35 @@
+name: CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    name: Build and test
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Install Rust nightly
+        uses: dtolnay/rust-toolchain@nightly
+        with:
+          components: clippy, rustfmt
+
+      - name: Cache Rust dependencies
+        uses: Swatinem/rust-cache@v2
+
+      - name: Check formatting
+        run: cargo fmt --all -- --check
+
+      - name: Run Clippy
+        run: cargo clippy --all-targets --all-features -- -D warnings
+
+      - name: Run tests
+        run: cargo test --all-features

.travis.yml

@@ -1,6 +1,6 @@
 # libnetkeeper
 
-[![Build Status](https://travis-ci.com/realityone/libnetkeeper.svg?branch=master)](https://travis-ci.com/realityone/libnetkeeper)
+[![CI](https://github.com/realityone/libnetkeeper/actions/workflows/ci.yml/badge.svg)](https://github.com/realityone/libnetkeeper/actions/workflows/ci.yml)
 
 Rust implementations of network authentication algorithms used by several campus and ISP clients.