Adding upstream version 2.5.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

.github/workflows/tests.yml

@@ -0,0 +1,24 @@
+on:
+  push:
+    branches:
+    - master
+  pull_request:
+name: Tests
+jobs:
+  test:
+    strategy:
+      matrix:
+        go-version: [1.22.x, 1.23.x, 1.24.x]
+        platform: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.platform }}
+    steps:
+    - name: Install Go
+      uses: actions/setup-go@v1
+      with:
+        go-version: ${{ matrix.go-version }}
+    - name: Checkout code
+      uses: actions/checkout@v2
+    - name: Test
+      run: |
+        go version
+        go test -race ./...