Migrate to GitHub actions (#151)

.github/workflows/build.yml

@@ -0,0 +1,28 @@
+name: Build
+on: [push, pull_request]
+jobs:
+  test:
+    runs-on: "${{ matrix.os }}"
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+        go: ["1.13"]
+    steps:
+      - uses: actions/setup-go@v1
+        with:
+          go-version: ${{ matrix.go }}
+      - uses: actions/checkout@v2
+      - run: go test -v -race -coverprofile=netx.cov -coverpkg=./... ./...
+      - name: Send coverage
+        uses: shogo82148/actions-goveralls@v1
+        with:
+          path-to-profile: netx.cov
+          parallel: true
+  finish:
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: shogo82148/actions-goveralls@v1
+        with:
+          parallel-finished: true

README.md

@@ -1,6 +1,6 @@
 # github.com/ooni/netx
 
-[![Build Status](https://travis-ci.org/ooni/netx.svg?branch=master)](https://travis-ci.org/ooni/netx) [![Coverage Status](https://coveralls.io/repos/github/ooni/netx/badge.svg?branch=master)](https://coveralls.io/github/ooni/netx?branch=master) [![Go Report Card](https://goreportcard.com/badge/github.com/ooni/netx)](https://goreportcard.com/report/github.com/ooni/netx)
+![Build Status](https://github.com/ooni/netx/workflows/Build/badge.svg) [![Coverage Status](https://coveralls.io/repos/github/ooni/netx/badge.svg?branch=master)](https://coveralls.io/github/ooni/netx?branch=master) [![Go Report Card](https://goreportcard.com/badge/github.com/ooni/netx)](https://goreportcard.com/report/github.com/ooni/netx)
 
 OONI extensions to the `net` and `net/http` packages. This code is
 used by `ooni/probe-engine` as a low level library to collect