Switch to github actions (#67)

+ drop node 10
+ update dependencies

.github/dependabot.yml

@@ -4,4 +4,7 @@ updates:
   directory: "/"
   schedule:
     interval: daily
-  open-pull-requests-limit: 20
+- package-ecosystem: github-actions
+  directory: "/"
+  schedule:
+    interval: daily

.github/workflows/tester.yml

@@ -0,0 +1,50 @@
+name: Tester
+
+on: [push, pull_request]
+
+jobs:
+  tester:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        node-version: ['12.x', '14.x', '16.x']
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Install Dependencies
+        run: npm install
+      - name: Test
+        run: npm test
+        env:
+          CI: true
+  coverage:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        node-version: ['14.x']
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Install Dependencies
+        run: npm install
+      - name: Coverage
+        run: npm run test-cov
+        env:
+          CI: true
+      - name: Coveralls
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.github_token }}