.github: use qemu to test on various architectures

Author: arl

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+on: [push, pull_request]
+name: Test
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.16.x
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Qemu
+        id: qemu
+        uses: docker/setup-qemu-action@v1
+        with:
+          image: tonistiigi/binfmt:latest
+          platforms: all
+      - name: Test
+        run: |
+          # amd64: little endian 64 bits
+          go test -coverprofile coverage.txt
+          go test -tags bitstring_debug .
+          # Big endian 64
+          GOARCH=ppc64 go test
+          # Little endian 32
+          GOARCH=arm go test
+          # Big endian 32
+          GOARCH=mips go test
+      - name: Codecov
+        run: bash <(curl -s https://codecov.io/bash)

.github/workflows/dependabot.yml

@@ -0,0 +1,7 @@
+version: 2
+updates:
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"