ci: add GitHub Actions test workflow

- Remove unused 'killed' const in util.go
- Remove unused 'command' var in examples/injection/main.go

.github/workflows/test.yml

@@ -0,0 +1,17 @@
+name: Test
+on:
+  push:
+    branches: [master]
+  pull_request:
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+      - run: go test -race ./...
+      - run: go vet ./...
+      - run: go build ./...
+

examples/injection/main.go

@@ -7,13 +7,6 @@ import (
 	"github.com/taigrr/adb"
 )
 
-var command string
-
-func init() {
-	// TODO  allow for any input to be used as the command
-	command = "ls"
-}
-
 func main() {
 	ctx := context.TODO()
 	devs, err := adb.Devices(ctx)

go.mod

@@ -1,5 +1,5 @@
 module github.com/taigrr/adb
 
-go 1.16
+go 1.26.0
 
 require github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510

util.go

@@ -10,8 +10,6 @@ import (
 
 var adb string
 
-const killed = 130
-
 func init() {
 	path, err := exec.LookPath("adb")
 	if err != nil {