ci: add pr testing workflow and improve npm scripts

.github/workflows/pull-request-testing.yml

@@ -0,0 +1,24 @@
+name: Pull request testing
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize, ready_for_review]
+
+jobs:
+  test_pr:
+    if: github.event.pull_request.draft == false
+    name: 'Testing pull request'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+      - name: Setup Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: 14
+      - name: Install dependencies
+        run: npm ci
+      - name: Run linter
+        run: npm run lint
+      - name: Run tests
+        run: npm test

.gitignore

@@ -1,4 +1,4 @@
-
+coverage
 node_modules
 .DS_Store
 output

package.json

@@ -6,9 +6,9 @@
   "scripts": {
     "release": "semantic-release",
     "get-version": "echo $npm_package_version",
-    "eslint": "eslint --config .eslintrc lib",
+    "lint": "eslint --max-warnings 0 --config .eslintrc lib",
     "package": "npm run test && ncc build lib/index.js -o dist",
-    "test": "npm run eslint && jest",
+    "test": "npm run lint && jest --coverage",
     "start": "node lib/index.js"
   },
   "repository": {