Replace travis with github action

.github/workflows/build.yml

@@ -0,0 +1,55 @@
+name: Build
+
+on:
+    push:
+    pull_request:
+
+jobs:
+    lint-coverage:
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v2
+            - name: Setup node 16
+              uses: actions/setup-node@v2
+              with:
+                  node-version: 16
+                  cache: "npm"
+            - run: npm ci
+            - run: npm run lint
+            - run: npm run bundle-and-test
+              env:
+                  REPORTER: "min"
+            - run: npm run coverage
+              env:
+                  REPORTER: "min"
+            - name: Send coverage to Coveralls
+              uses: coverallsapp/github-action@1.1.3
+              with:
+                  github-token: ${{ secrets.GITHUB_TOKEN }}
+
+    run-tests:
+        needs: lint-coverage
+        runs-on: ubuntu-latest
+
+        strategy:
+            matrix:
+                # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
+                node_version:
+                    - 12.20.0
+                    - 14.13.0
+                    - 16
+
+        steps:
+            - uses: actions/checkout@v2
+            - name: Setup node ${{ matrix.node_version }}
+              uses: actions/setup-node@v2
+              with:
+                  node-version: ${{ matrix.node_version }}
+                  cache: "npm"
+            - run: npm ci
+            - run: npm run test
+              env:
+                  REPORTER: "min"
+            - run: npm run esm-to-cjs-and-test
+              env:
+                  REPORTER: "min"

README.md

@@ -1,5 +1,5 @@
 [![NPM version](https://img.shields.io/npm/v/clap.svg)](https://www.npmjs.com/package/clap)
-[![Build Status](https://travis-ci.org/lahmatiy/clap.svg?branch=master)](https://travis-ci.org/lahmatiy/clap)
+[![Build Status](https://github.com/lahmatiy/clap/actions/workflows/build.yml/badge.svg)](https://github.com/lahmatiy/clap/actions/workflows/build.yml)
 [![Coverage Status](https://coveralls.io/repos/github/lahmatiy/clap/badge.svg?branch=master)](https://coveralls.io/github/lahmatiy/clap?branch=master)
 
 # Clap.js