Setup GitHub actions

.github/workflows/nodejs.yml

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+name: Node.js CI
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [10.x, 12.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm ci
+    - run: npm run build --if-present
+    - run: npm test
+      env:
+        CI: true

.gitignore

@@ -1 +1,2 @@
 *.zip
+node_modules

package.json

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+{
+    "name": "yomichan",
+    "version": "0.0.0",
+    "description": "Japanese pop-up dictionary extension for Chrome and Firefox.",
+    "directories": {
+        "test": "test"
+    },
+    "scripts": {
+        "test": "npm run test-lint",
+        "test-lint": "eslint ."
+    },
+    "repository": {
+        "type": "git",
+        "url": "git+https://github.com/FooSoft/yomichan.git"
+    },
+    "author": "FooSoft",
+    "licenses": [
+        {
+            "type": "GPLv3",
+            "url": "https://www.gnu.org/licenses/gpl-3.0.html"
+        }
+    ],
+    "bugs": {
+        "url": "https://github.com/FooSoft/yomichan/issues"
+    },
+    "homepage": "https://foosoft.net/projects/yomichan/",
+    "devDependencies": {
+        "eslint": "^6.8.0"
+    }
+}