Switch from travis to GitHub Actions

.github/workflows/build.yml

@@ -0,0 +1,25 @@
+name: Build
+
+on:
+  push:
+    branches:
+  pull_request:
+
+jobs:
+  build:
+    name: Build ${{ matrix.rust }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        rust: [stable, nightly]
+
+    steps:
+    - uses: hecrj/setup-rust-action@master
+      with:
+        rust-version: ${{ matrix.rust }}
+    - uses: actions/checkout@v1
+    - name: Build
+      run: cargo build --verbose
+    - name: Run tests
+      run: cargo test --verbose

.github/workflows/publish.yml

@@ -0,0 +1,44 @@
+name: Publish
+
+on:
+  push:
+    tags:
+      - '*.*.*'
+
+jobs:
+  publish:
+    name: Publish for ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        # This should work with only the `include`s but it currently doesn't because of this bug:
+        # https://github.saobby.my.eu.orgmunity/t5/How-to-use-Git-and-GitHub/GitHub-Actions-Matrix-options-dont-work-as-documented/td-p/29558
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        include:
+          - os: ubuntu-latest
+            artifact_name: dummyhttp
+            release_name: dummyhttp-linux-amd64
+          - os: windows-latest
+            artifact_name: dummyhttp.exe
+            release_name: dummyhttp-windows-amd64.exe
+          - os: macos-latest
+            artifact_name: dummyhttp
+            release_name: dummyhttp-macos-amd64
+
+    steps:
+    - uses: hecrj/setup-rust-action@master
+      with:
+        rust-version: stable
+    - uses: actions/checkout@v1
+    - name: Build
+      run: cargo build --release --locked
+    - uses: svenstaro/upx-action@v1-release
+      with:
+        file: target/release/${{ matrix.artifact_name }}
+    - name: Upload binaries to release
+      uses: svenstaro/upload-release-action@v1-release
+      with:
+        repo_token: ${{ secrets.GITHUB_TOKEN }}
+        file: target/release/${{ matrix.artifact_name }}
+        asset_name: ${{ matrix.release_name }}
+        tag: ${{ github.ref }}