switch to github actions

.github/workflows/test.yml

@@ -0,0 +1,18 @@
+on: [push]
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        node-version: [8, 10, 12]
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+    steps:
+    - uses: actions/checkout@v1
+    - uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: |
+        npm install
+        npm test
+      env:
+        CI: true

.travis.yml

@@ -1,9 +0,0 @@
-language: node_js
-os:
-  - linux
-  - osx
-  - windows
-node_js:
-  - "8"
-  - "10"
-  - node