Use GHA for CI

Author: eldruin

.github/bors.toml

@@ -1,5 +1,24 @@
 block_labels = ["needs-decision"]
 delete_merged_branches = true
 required_approvals = 1
-status = ["continuous-integration/travis-ci/push"]
+status = [
+    "build (stable, aarch64-unknown-linux-gnu)",
+    "build (stable, arm-unknown-linux-gnueabi)",
+    "build (stable, armv7-unknown-linux-gnueabihf)",
+    "build (stable, i686-unknown-linux-gnu)",
+    "build (stable, i686-unknown-linux-musl)",
+    "build (stable, mips-unknown-linux-gnu)",
+    "build (stable, mips64-unknown-linux-gnuabi64)",
+    "build (stable, mips64el-unknown-linux-gnuabi64)",
+    "build (stable, mipsel-unknown-linux-gnu)",
+    "build (stable, powerpc-unknown-linux-gnu)",
+    "build (stable, powerpc64le-unknown-linux-gnu)",
+    "build (stable, s390x-unknown-linux-gnu)",
+    "build (stable, x86_64-unknown-linux-gnu)",
+    "build (stable, x86_64-unknown-linux-musl)",
+
+    "build (1.45.0, x86_64-unknown-linux-gnu)",
+
+    "checks"
+]
 timeout_sec = 7200

.github/workflows/ci.yml

@@ -0,0 +1,116 @@
+on:
+  push:
+    branches: [ staging, trying, master ]
+  pull_request:
+
+name: Build
+
+env:
+  RUSTFLAGS: '--deny warnings'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        rust: [stable]
+        TARGET:
+          - aarch64-unknown-linux-gnu
+          - arm-unknown-linux-gnueabi
+          - armv7-unknown-linux-gnueabihf
+          - i686-unknown-linux-gnu
+          - i686-unknown-linux-musl
+          - mips-unknown-linux-gnu
+          - mips64-unknown-linux-gnuabi64
+          - mips64el-unknown-linux-gnuabi64
+          - mipsel-unknown-linux-gnu
+          - powerpc-unknown-linux-gnu
+          # - powerpc64-unknown-linux-gnu
+          - powerpc64le-unknown-linux-gnu
+          - s390x-unknown-linux-gnu
+          - x86_64-unknown-linux-gnu
+          - x86_64-unknown-linux-musl
+
+        include:
+          # MSRV
+          - rust: 1.45.0
+            TARGET: x86_64-unknown-linux-gnu
+
+          # Test nightly but don't fail
+          - rust: nightly
+            TARGET: x86_64-unknown-linux-gnu
+            experimental: true
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.rust }}
+          target: ${{ matrix.TARGET }}
+          override: true
+
+      - name: Build
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --target=${{ matrix.TARGET }}
+
+      - name: Build all features
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --target=${{ matrix.TARGET }} --all-features
+
+      - name: Test
+        uses: actions-rs/cargo@v1
+        with:
+          use-cross: true
+          command: test
+          args: --target=${{ matrix.TARGET }}
+
+      - name: Test all features
+        uses: actions-rs/cargo@v1
+        with:
+          use-cross: true
+          command: test
+          args: --target=${{ matrix.TARGET }} --all-features
+
+  checks:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          components: rustfmt
+
+      - name: Doc
+        uses: actions-rs/cargo@v1
+        with:
+          command: doc
+
+      - name: Formatting
+        uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: --all -- --check
+
+  clippy:
+    runs-on: ubuntu-latest
+    env:
+      RUSTFLAGS: '--allow warnings'
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: 1.45.0
+          components: clippy
+
+      - uses: actions-rs/clippy-check@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+