ci: add basic CI

- Add GitHub Action CI for build and test.
- Add dependabot config.

.github/dependabot.yml

@@ -0,0 +1,12 @@
+version: 2
+updates:
+- package-ecosystem: gomod
+  directory: "/"
+  schedule:
+    interval: weekly
+  open-pull-requests-limit: 10
+
+- package-ecosystem: github-actions
+  directory: "/"
+  schedule:
+    interval: weekly

.github/workflows/build.yml

@@ -0,0 +1,41 @@
+# This workflow will build a golang project
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-go
+
+name: Go
+
+on:
+  push:
+    paths:
+        - ".github/workflows/build.yml"
+        - "go.mod"
+        - "go.sum"
+        - "**.go"
+    branches: [ "master" ]
+  pull_request:
+    paths:
+      - ".github/workflows/build.yml"
+      - "go.mod"
+      - "go.sum"
+      - "**.go"
+    branches: [ "master" ]
+  # This CI will be triigerred on any merge_group events
+  merge_group:
+
+jobs:
+
+  build:
+    name: "Build+Test"
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v4
+      with:
+        go-version: '1.12'
+
+    - name: Build
+      run: go build -v ./...
+
+    - name: Test
+      run: go test -v ./...