Move to Pnpm and Add a basic github actions CI

.github/workflows/ci.yml

@@ -0,0 +1,100 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+      - master
+  pull_request: {}
+
+concurrency:
+  group: ci-${{ github.head_ref || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test:
+    name: "Test"
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version:
+          - 18
+          - 20
+          - 22
+          - 24
+
+    steps:
+      - uses: actions/checkout@v6
+      - uses: pnpm/action-setup@v4
+      - uses: actions/setup-node@v6
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: pnpm
+      - run: pnpm install
+      - run: pnpm test
+
+  super-legacy-node-test:
+    name: "Super Legacy Node Test"
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version:
+          - "0.10"
+          - "0.12"
+          - 4
+
+    steps:
+      - uses: actions/checkout@v6
+      # use the built-in npm for these super old tests
+      - run: cat package.json | jq "del(.packageManager)" | tee package.json
+      - uses: actions/setup-node@v6
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: npm
+      - run: npm install
+      - run: npm test
+
+  legacy-node-test:
+    name: "Legacy Node Test"
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version:
+          - 6
+          - 8
+          - 10
+          - 12
+          - 14
+          - 16
+
+    steps:
+      - uses: actions/checkout@v6
+      # prevent yarn from complaining about the packageManager key in the package.json
+      - run: cat package.json | jq ".packageManager = \"yarn@1.22.22\"" | tee package.json
+      - uses: actions/setup-node@v6
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: yarn
+      - run: yarn install --frozen-lockfile --ignore-engines
+      - run: yarn test
+
+  windows-test:
+    name: "Windows smoke test"
+    runs-on: windows-latest
+    timeout-minutes: 5
+
+    steps:
+      - uses: actions/checkout@v6
+      - uses: pnpm/action-setup@v4
+      - uses: actions/setup-node@v6
+        with:
+          node-version: 24
+          cache: pnpm
+      - run: pnpm install
+      - run: pnpm test

package.json

@@ -26,5 +26,6 @@
   "devDependencies": {
     "chai": "^3.5.0",
     "mocha": "^2.2.4"
-  }
+  },
+  "packageManager": "pnpm@10.28.2"
 }