Switch to Github Actions for CI

Dropping Travis and setting up Github Actions for CI
Dropped support for Node < 12

Author: jrjohnson

.github/workflows/ci.yaml

@@ -0,0 +1,40 @@
+name: Continuous Integration
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [12.x, 14.x, 16.x]
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v2
+      with:
+        node-version: ${{ matrix.node-version }}
+        cache: 'yarn'
+    - run: yarn install
+    - run: yarn test
+
+  test-floating:
+    name: Floating Dependencies
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [12.x, 14.x, 16.x]
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v2
+      with:
+        node-version: ${{ matrix.node-version }}
+        cache: 'yarn'
+    - name: install dependencies
+      run: yarn install --no-lockfile
+    - name: test
+      run: yarn test

.travis.yml

@@ -12,7 +12,7 @@
   },
   "repository": "https://github.com/ember-cli-deploy/ember-cli-deploy-s3-index",
   "engines": {
-    "node": ">= 4"
+    "node": "12.* || 14.* || >= 16"
   },
   "author": "",
   "license": "MIT",