Replace Travis CI with Github Actions

.github/workflows/test.yml

@@ -0,0 +1,34 @@
+name: ofxgo CI Test
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        go-version: [1.13.x, 1.14.x, 1.15.x]
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Install Go
+      uses: actions/setup-go@v2
+      with:
+        go-version: ${{ matrix.go-version }}
+    - name: Checkout code
+      uses: actions/checkout@v2
+    - name: Test
+      run: go test -v -covermode=count -coverprofile="profile.cov" ./...
+    - name: Send Coverage
+      uses: shogo82148/actions-goveralls@v1
+      with:
+        path-to-profile: "profile.cov"
+        flag-name: ${{ matrix.os }}-go-${{ matrix.go-version }}
+        parallel: true
+  # notifies that all test jobs are finished.
+  finish:
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: shogo82148/actions-goveralls@v1
+        with:
+          parallel-finished: true