Replace Travis CI with GitHub Actions

.github/workflows/ci.yml

@@ -0,0 +1,37 @@
+name: Continuous integration
+on:
+  push:
+    branches:
+      - staging
+      - trying
+
+env:
+  CARGO_TERM_COLOR: always
+  CARGO_INCREMENTAL: 0
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        include:
+          - rust: 1.36.0  # MSRV
+          - rust: stable
+          - rust: beta
+          - rust: nightly
+          - rust: nightly
+            target: i686-unknown-linux-gnu
+          - rust: stable
+            target: mips64-unknown-linux-gnuabi64
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.rust }}
+          override: true
+      - name: Tests
+        env:
+          TARGET: ${{ matrix.target }}
+        run: ./ci/script.sh

.github/workflows/pr.yml

@@ -0,0 +1,25 @@
+name: Pull Request
+on:
+  pull_request:
+
+env:
+  CARGO_TERM_COLOR: always
+  CARGO_INCREMENTAL: 0
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        include:
+          - rust: stable
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.rust }}
+          override: true
+      - name: Tests
+        run: ./ci/script.sh

README.md

@@ -1,6 +1,8 @@
 # primal
 
-[![Build Status](https://travis-ci.org/huonw/primal.png)](https://travis-ci.org/huonw/primal) [![codecov](https://codecov.io/gh/huonw/primal/branch/master/graph/badge.svg)](https://codecov.io/gh/huonw/primal) [![crates.io](https://img.shields.io/crates/v/primal.svg)](https://crates.io/crates/primal)
+[![crates.io](https://img.shields.io/crates/v/primal.svg)](https://crates.io/crates/primal)
+[![documentation](https://docs.rs/primal/badge.svg)](https://docs.rs/primal)
+![minimum rustc 1.36](https://img.shields.io/badge/rustc-1.36+-red.svg)
 
 `primal` puts raw power into prime numbers.
 

bors.toml

@@ -1,3 +1,8 @@
 status = [
-  "continuous-integration/travis-ci/push"
+  "tests (1.36.0)",
+  "tests (stable)",
+  "tests (beta)",
+  "tests (nightly)",
+  "tests (nightly, i686-unknown-linux-gnu)",
+  "tests (stable, mips64-unknown-linux-gnuabi64)",
 ]