add github actions

Author: ZoeyR

.github/workflows/rust.yml

@@ -0,0 +1,50 @@
+name: CI
+
+on:
+  push:
+    branches:
+      master
+  pull_request:
+    branches:
+      master
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        rust: [stable, beta, nightly]
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ matrix.rust }}
+          override: true
+      - uses: actions-rs/cargo@v1
+        with:
+          command: test
+  check:
+    runs-on: ubuntu-latest
+    name: Check
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+      - uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: -- --check
+
+      - uses: actions-rs/[email protected]
+        with:
+          args: --ignore-tests -- --test-threads 1          
+      - uses: codecov/codecov-action@v1
+      - name: Archive code coverage results
+        uses: actions/upload-artifact@v1
+        with:
+          name: code-coverage-report
+          path: cobertura.xml

README.md

@@ -1,6 +1,6 @@
 # rust-dotenv 
 
-[![Build Status](https://dev.azure.com/dotenv-rs/dotenv/_apis/build/status/dotenv-rs.dotenv?branchName=master)](https://dev.azure.com/dotenv-rs/dotenv/_build/latest?definitionId=2&branchName=master)
+![CI](https://github.com/dotenv-rs/dotenv/workflows/CI/badge.svg)
 [![codecov](https://codecov.io/gh/dotenv-rs/dotenv/branch/master/graph/badge.svg)](https://codecov.io/gh/dotenv-rs/dotenv)
 [![Crates.io](https://img.shields.io/crates/v/dotenv.svg)](https://crates.io/crates/dotenv)