ci: switch to GHA

Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>

.github/workflows/ci.yml

@@ -0,0 +1,34 @@
+name: ci
+
+on:
+  push:
+    tags:
+      - "v*"
+    branches:
+      - main
+  pull_request:
+  schedule:
+    - cron: "30 10 * * 0"
+
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+        go-version:
+          - "1.14"
+          - "1.20"
+          - "1.21"
+          - "^1"
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-go@v4
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: unit tests
+        run: go test -v -cover ./...

README.md

@@ -1,6 +1,6 @@
 ## `filepath-securejoin` ##
 
-[![Build Status](https://travis-ci.org/cyphar/filepath-securejoin.svg?branch=master)](https://travis-ci.org/cyphar/filepath-securejoin)
+[![Build Status](https://github.com/cyphar/filepath-securejoin/actions/workflows/ci.yml/badge.svg)](https://github.com/cyphar/filepath-securejoin/actions/workflows/ci.yml)
 
 An implementation of `SecureJoin`, a [candidate for inclusion in the Go
 standard library][go#20126]. The purpose of this function is to be a "secure"