Adding upstream version 3.0.0.

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

.github/workflows/test.yml

@@ -0,0 +1,30 @@
+name: test
+on:
+  pull_request:
+    paths-ignore:
+      - '*.md'
+  push:
+    branches:
+      - master
+    paths-ignore:
+      - '*.md'
+jobs:
+  test:
+    name: test
+    runs-on: ubuntu-latest
+    timeout-minutes: 3
+    steps:
+      - uses: actions/setup-go@v5
+        with:
+          go-version: 1.23.3
+      - uses: actions/checkout@v4
+      - name: Test (race)
+        run: go test ./... -race
+      - name: Test (coverage)
+        run: go test ./... -coverprofile=coverage.txt -covermode=atomic
+      - name: Codecov
+        uses: codecov/codecov-action@v5.1.2
+        with:
+          files: ./coverage.txt
+          token: ${{ secrets.CODECOV_TOKEN }}
+