Use github actions instead of travis

.github/workflows/test.yml

@@ -0,0 +1,20 @@
+name: Lint
+on: [push, pull_request]
+jobs:
+  lint:
+    name: ESLint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Install Node v14
+        uses: actions/setup-node@v1
+        with:
+          node-version: 14
+
+      - name: Install dependencies
+        run: npm install -g eslint@7 && eslint-config-amber eslint-plugin-json
+
+      - name: Run ESLint
+        run: npm test

.travis.yml

@@ -1,5 +0,0 @@
-sudo: false
-language: node_js
-node_js:
-  - '12'
-install: npm i -g eslint && npm i eslint-config-amber eslint-plugin-json