Migrate to GitHub Actions (#81)

* Migrate to GitHub Actions

* use actions-rs/*

* add "required" parameters

Author: nickelc

.github/workflows/ci.yml

@@ -0,0 +1,59 @@
+name: CI
+
+on: [push, pull_request]
+
+env:
+  minrust: 1.41.0
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        rust: [stable, beta, nightly]
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ matrix.rust }}
+          profile: minimal
+          override: true
+
+      - name: cargo test --all
+        uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: --all
+      - name: cargo test --benches
+        if: matrix.rust == 'nightly'
+        uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: --benches
+
+      - name: Check minimal versions
+        if: matrix.rust == 'nightly'
+        run: |
+          cargo clean
+          cargo update -Z minimal-versions
+          cargo check
+
+  MSRV:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install rust ${{ env.minrust }}
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ env.minrust }}
+          profile: minimal
+          override: true
+
+      - name: cargo build
+        uses: actions-rs/cargo@v1
+        with:
+          command: build

.travis.yml

@@ -1,5 +1,5 @@
 # rust http headers
 
-[![Build Status](https://travis-ci.org/hyperium/headers.svg?branch=master)](https://travis-ci.org/hyperium/header)
+[![Build Status](https://github.com/hyperium/headers/workflows/CI/badge.svg)](https://github.com/hyperium/headers/actions?query=workflow%3ACI)
 
 Typed HTTP headers.