chore: add auto-release workflow

Author: rvagg

.github/workflows/lint.yml

@@ -0,0 +1,77 @@
+name: Test & Maybe Release
+on: [push, pull_request]
+jobs:
+  test:
+    name: Node ${{ matrix.node }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        node: [12, 14, 16]
+        # windows support not quite ready: os: [ubuntu-latest, windows-latest]
+        os: [ubuntu-latest]
+
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v2
+
+      - run: git fetch --prune --unshallow
+
+      - name: Set Node.js version
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node }}
+
+      - run: node --version
+      - run: npm --version
+      - run: git --version
+
+      - name: Install npm dependencies
+        run: npm ci
+
+      - name: Run tests
+        run: npm test
+
+  release:
+    name: Release
+    needs: test
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2.3.4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v2.4.0
+        with:
+          node-version: 14
+
+      - name: Install dependencies
+        run: |
+          npm install --no-progress --no-package-lock --no-save
+
+      - name: Build
+        run: |
+          npm run build
+
+      - name: Install plugins
+        run: |
+          npm install \
+            @semantic-release/commit-analyzer \
+            conventional-changelog-conventionalcommits \
+            @semantic-release/release-notes-generator \
+            @semantic-release/npm \
+            @semantic-release/github \
+            @semantic-release/git \
+            @semantic-release/changelog \
+            --no-progress --no-package-lock --no-save
+
+      - name: Release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+        run: npx semantic-release

.github/workflows/test-and-release.yml

@@ -8,7 +8,8 @@
   },
   "scripts": {
     "lint": "standard",
-    "format": "standard --fix"
+    "format": "standard --fix",
+    "test": "npm run lint"
   },
   "author": "Rod <rod@vagg.org> (http://r.va.gg/)",
   "license": "MIT",
@@ -33,5 +34,86 @@
   "preferGlobal": true,
   "devDependencies": {
     "standard": "^16.0.3"
+  },
+  "release": {
+    "branches": [
+      "main"
+    ],
+    "plugins": [
+      [
+        "@semantic-release/commit-analyzer",
+        {
+          "preset": "conventionalcommits",
+          "releaseRules": [
+            {
+              "breaking": true,
+              "release": "major"
+            },
+            {
+              "revert": true,
+              "release": "patch"
+            },
+            {
+              "type": "feat",
+              "release": "minor"
+            },
+            {
+              "type": "fix",
+              "release": "patch"
+            },
+            {
+              "type": "chore",
+              "release": "patch"
+            },
+            {
+              "type": "docs",
+              "release": "patch"
+            },
+            {
+              "type": "test",
+              "release": "patch"
+            },
+            {
+              "scope": "no-release",
+              "release": false
+            }
+          ]
+        }
+      ],
+      [
+        "@semantic-release/release-notes-generator",
+        {
+          "preset": "conventionalcommits",
+          "presetConfig": {
+            "types": [
+              {
+                "type": "feat",
+                "section": "Features"
+              },
+              {
+                "type": "fix",
+                "section": "Bug Fixes"
+              },
+              {
+                "type": "chore",
+                "section": "Trivial Changes"
+              },
+              {
+                "type": "docs",
+                "section": "Trivial Changes"
+              },
+              {
+                "type": "test",
+                "section": "Tests"
+              }
+            ]
+          }
+        }
+      ],
+      "@semantic-release/changelog",
+      "@semantic-release/npm",
+      "@semantic-release/github",
+      "@semantic-release/git"
+    ]
   }
 }