ci/cd: added github actions for test and code coverage

.github/workflows/codecov.yml

@@ -0,0 +1,8 @@
+steps:
+- uses: actions/checkout@master
+- uses: codecov/codecov-action@v3
+  with:
+    flags: unittests # optional
+    name: codecov-umbrella # optional
+    fail_ci_if_error: false # optional (default = false)
+    verbose: true # optional (default = false)

.github/workflows/test.yml

@@ -0,0 +1,26 @@
+name: Node.js CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [12.x, 13.x, 14.x, 15.x, 16.x, 17.x]
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm ci
+      - run: npm run build --if-present
+      - run: npm test

readme.md

@@ -1,7 +1,7 @@
 <div align="center">
 <h1>NodeJS Currency Converter</h1>
 
-[![Build Status](https://travis-ci.com/paul-shuvo/nodejs-currency-converter.svg?branch=master)](https://travis-ci.com/paul-shuvo/nodejs-currency-converter) [![Known Vulnerabilities](https://snyk.io/test/github/paul-shuvo/nodejs-currency-converter/badge.svg?targetFile=package.json)](https://snyk.io/test/github/paul-shuvo/nodejs-currency-converter?targetFile=package.json)  ![supported node versions](https://img.shields.io/badge/node%20v-12.x%20%7C%2013.x%20%7C%2014.x%20%7C%2015.x%20%7C%2016.x%20%7C%2017.x-blue) [![codecov](https://codecov.io/gh/paul-shuvo/nodejs-currency-converter/branch/master/graph/badge.svg)](https://codecov.io/gh/paul-shuvo/nodejs-currency-converter)
+[![Build Status](https://github.com/paul-shuvo/nodejs-currency-converter/actions/workflows/test/badge.svg)](https://travis-ci.com/paul-shuvo/nodejs-currency-converter) [![Known Vulnerabilities](https://snyk.io/test/github/paul-shuvo/nodejs-currency-converter/badge.svg?targetFile=package.json)](https://snyk.io/test/github/paul-shuvo/nodejs-currency-converter?targetFile=package.json)  ![supported node versions](https://img.shields.io/badge/node%20v-12.x%20%7C%2013.x%20%7C%2014.x%20%7C%2015.x%20%7C%2016.x%20%7C%2017.x-blue) [![codecov](https://codecov.io/gh/paul-shuvo/nodejs-currency-converter/branch/master/graph/badge.svg)](https://codecov.io/gh/paul-shuvo/nodejs-currency-converter)
  ![license: MIT](https://img.shields.io/npm/l/vue.svg) [![Maintainability](https://api.codeclimate.com/v1/badges/b512e403dfc172ee3b0d/maintainability)](https://codeclimate.com/github/paul-shuvo/nodejs-currency-converter/maintainability) [![npm version](https://badge.fury.io/js/currency-converter-lt.svg)](https://badge.fury.io/js/currency-converter-lt) ![npm](https://img.shields.io/npm/dm/currency-converter-lt)
 <p>A minimal currency converter library for NodeJS that works out of the box.</p>
 </div>