Attempt to use GitHub Actions.

.github/workflows/test.yml

@@ -0,0 +1,28 @@
+name: Test
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+    - name: Set up Go 1.x
+      uses: actions/setup-go@v2
+      with:
+        go-version: ^1.14
+      id: go
+
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v2
+
+    - name: Build
+      run: go build -v .
+
+    - name: Test
+      run: go test -coverprofile=coverage.out -covermode=atomic -v .
+
+    - name: Upload coverage report
+      uses: codecov/codecov-action@v1
+      with:
+        file: ./coverage.out

.travis.yml

@@ -1,6 +0,0 @@
-language: go
-
-go:
-  - '1.13'
-  - '1.14'
-  - tip