Add Dependabot and CI integration.

.github/dependabot.yml

@@ -0,0 +1,15 @@
+version: 2
+updates:
+  - package-ecosystem: gomod
+    directory: /
+    schedule:
+      interval: daily
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    groups:
+      artifacts:
+        patterns:
+        - "actions/*-artifact"

.github/workflows/lint.yml

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+name: lint
+
+on:
+  push:
+    branches: [ master ]
+    paths:
+      - '.github/workflows/lint.yml'
+      - '.golangci.yml'
+      - '**.go'
+      - 'go.*'
+  pull_request:
+    branches: [ master ]
+    paths:
+      - '.github/workflows/lint.yml'
+      - '.golangci.yml'
+      - '**.go'
+      - 'go.*'
+
+permissions:
+  contents: read
+
+jobs:
+  lint:
+    name: golang
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.21"
+
+      - name: lint
+        uses: golangci/[email protected]
+        with:
+          version: latest
+          args: --timeout=2m0s
+          skip-cache: true
+
+  dependencies:
+    name: dependencies
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "stable"
+
+      - name: Check minimum supported version of Go
+        run: |
+          go mod tidy -go=1.21 -compat=1.21
+
+      - name: Check go.mod / go.sum
+        run: |
+          git add go.*
+          git diff --cached --exit-code go.*

.github/workflows/test.yml

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+name: test
+
+on:
+  push:
+    branches: [ master ]
+    paths:
+      - '.github/workflows/test.yml'
+      - '**.go'
+      - 'go.*'
+  pull_request:
+    branches: [ master ]
+    paths:
+      - '.github/workflows/test.yml'
+      - '**.go'
+      - 'go.*'
+
+permissions:
+  contents: read
+
+jobs:
+  go:
+    strategy:
+      matrix:
+        go-version:
+          - "1.21"
+          - "1.22"
+          - "1.23"
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/setup-go@v5
+      with:
+        go-version: ${{ matrix.go-version }}
+
+    - name: Install dependencies
+      run: |
+        apt-get -y update
+        apt-get -y install libheif-dev
+
+    - name: Run tests
+      run: |
+        go test -v ./...

.golangci.yml

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+linters:
+  enable:
+    - gofmt
+    - revive
+
+linters-settings:
+  revive:
+    ignoreGeneratedHeader: true
+    severity: warning
+    rules:
+      - name: blank-imports
+      - name: context-as-argument
+      - name: context-keys-type
+      - name: dot-imports
+      - name: error-return
+      #- name: error-strings
+      - name: error-naming
+      - name: exported
+      - name: if-return
+      - name: increment-decrement
+      #- name: var-naming
+      - name: var-declaration
+      - name: package-comments
+      - name: range
+      - name: receiver-naming
+      - name: time-naming
+      - name: unexported-return
+      #- name: indent-error-flow
+      - name: errorf
+      - name: empty-block
+      - name: superfluous-else
+      #- name: unused-parameter
+      - name: unreachable-code
+      - name: redefines-builtin-id
+
+issues:
+  exclude-rules:
+    - path: \.gen\.go
+      linters:
+        - gofmt