switch from travis to GitHub actions

.github/workflows/push.yml

@@ -0,0 +1,33 @@
+name: Push
+
+on:
+  push:
+    branches: [ master ]
+
+jobs:
+
+  build:
+    name: CI
+    runs-on: ubuntu-latest
+    steps:
+
+    - name: Set up Go 1.x
+      uses: actions/setup-go@v2
+      with:
+        # Run on the latest minor release of Go 1.15:
+        go-version: ^1.15
+      id: go
+
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v2
+
+    - name: Ensure all files were formatted as per gofmt
+      run: |
+        [ "$(gofmt -l $(find . -name '*.go') 2>&1)" = "" ]
+
+    - name: Run tests
+      run: |
+        go vet .
+        go test ./...
+        go test -c github.com/google/nftables
+        sudo ./nftables.test -test.v -run_system_tests

.travis.yml

@@ -1,18 +0,0 @@
-# Use the (faster) container-based infrastructure, see also
-# http://docs.travis-ci.com/user/workers/container-based-infrastructure/
-sudo: true
-dist: trusty
-
-language: go
-go:
-  - "1.13"
-
-script:
-  # Check whether files are syntactically correct.
-  - "gofmt -l $(find . -name '*.go' | tr '\\n' ' ') >/dev/null"
-  # Check whether files were not gofmt'ed.
-  - "gosrc=$(find . -name '*.go' | tr '\\n' ' '); [ $(gofmt -l $gosrc 2>&- | wc -l) -eq 0 ] || (echo 'gofmt was not run on these files:'; gofmt -l $gosrc 2>&-; false)"
-  - go vet .
-  - go test ./...
-  - go test -c github.com/google/nftables
-  - sudo ./nftables.test -test.v -run_system_tests