Update tooling & dependencies (#71)

* yarn to npm, travis to github actions

* Update dependencies

* Run CI on pull request

* Format __tests__

Author: epiphone

.github/workflows/test.yml

@@ -0,0 +1,19 @@
+name: Build and test
+
+on: [push, pull_request]
+
+env:
+  CI: true
+
+jobs:
+  test-job:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+      - run: npm ci
+      - run: npm run build
+      - run: npm run test:format
+      - run: npm run test:lint
+      - run: npm test
+      - run: npm run send-coverage

.travis.yml

@@ -1,12 +1,12 @@
 # routing-controllers-openapi
 
-[![Build Status](https://travis-ci.org/epiphone/routing-controllers-openapi.svg?branch=master)](https://travis-ci.org/epiphone/routing-controllers-openapi) [![codecov](https://codecov.io/gh/epiphone/routing-controllers-openapi/branch/master/graph/badge.svg)](https://codecov.io/gh/epiphone/routing-controllers-openapi) [![npm version](https://badge.fury.io/js/routing-controllers-openapi.svg)](https://badge.fury.io/js/routing-controllers-openapi)
+[![codecov](https://codecov.io/gh/epiphone/routing-controllers-openapi/branch/master/graph/badge.svg)](https://codecov.io/gh/epiphone/routing-controllers-openapi) [![npm version](https://badge.fury.io/js/routing-controllers-openapi.svg)](https://badge.fury.io/js/routing-controllers-openapi)
 
 Runtime OpenAPI v3 schema generation for [routing-controllers](https://github.com/typestack/routing-controllers).
 
 ## Installation
 
-`yarn add routing-controllers-openapi`
+`npm install --save routing-controllers-openapi`
 
 ## Usage