Switch to github actions for CI

.github/workflows/main.yml

@@ -0,0 +1,44 @@
+name: CI
+on: [push, pull_request]
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        rust: [stable, beta, nightly]
+    steps:
+    - uses: actions/checkout@master
+    - name: Install Rust (rustup)
+      run: rustup update ${{ matrix.rust }} && rustup default ${{ matrix.rust }}
+    - run: cargo test
+    - run: cargo test --features preserve_order
+    - run: cargo test --manifest-path test-suite/Cargo.toml
+
+  rustfmt:
+    name: Rustfmt
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@master
+    - name: Install Rust
+      run: rustup update stable && rustup default stable && rustup component add rustfmt
+    - run: cargo fmt -- --check
+
+  publish_docs:
+    name: Publish Documentation
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Install Rust
+        run: rustup update stable && rustup default stable
+      - name: Build documentation
+        run: cargo doc --no-deps --all-features
+      - name: Publish documentation
+        run: |
+          cd target/doc
+          git init
+          git add .
+          git -c user.name='ci' -c user.email='ci' commit -m init
+          git push -f -q https://git:${{ secrets.github_token }}@github.com/${{ github.repository }} HEAD:gh-pages
+        if: github.event_name == 'push' && github.event.ref == 'refs/heads/master'

.travis.yml

@@ -1,24 +0,0 @@
-language: rust
-matrix:
-  include:
-    - rust: stable
-    - rust: beta
-    - rust: nightly
-    - name: "master doc to gh-pages"
-      rust: nightly
-      script:
-        - cargo doc --no-deps
-      deploy:
-        provider: script
-        script: curl -LsSf https://git.io/fhJ8n | rustc - && (cd target/doc && ../../rust_out)
-        skip_cleanup: true
-        on:
-          branch: master
-script:
-  - cargo test
-  - cargo test --features preserve_order
-  - cargo test --manifest-path test-suite/Cargo.toml
-  - rustdoc --test README.md -L target
-notifications:
-  email:
-    on_success: never