Migrate CI to GitHub Actions (#392)

ci/test-stable.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+set -ex
+
+cmd="${1:-test}"
+
+# Install cargo-hack for feature flag test
+cargo install cargo-hack
+
+# Run with each feature
+# * --each-feature includes both default/no-default features
+# * --optional-deps is needed for serde feature
+cargo hack "${cmd}" --each-feature --optional-deps
+# Run with all features
+cargo "${cmd}" --all-features
+
+cargo doc --no-deps --all-features
+
+if [[ "${RUST_VERSION}" == "nightly"* ]]; then
+    # Check benchmarks
+    cargo check --benches
+
+    # Check minimal versions
+    cargo clean
+    cargo update -Zminimal-versions
+    cargo check --all-features
+fi