replace travis badge (#199)

* replace travis badge

* replace codecov badge

README.md

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 # GoVultr
 
-[![Build Status](https://travis-ci.org/vultr/govultr.svg?branch=master)](https://travis-ci.org/vultr/govultr)
+[![Automatic Releaser](https://github.com/vultr/govultr/actions/workflows/releaser.yml/badge.svg)](https://github.com/vultr/govultr/actions/workflows/releaser.yml)
 [![PkgGoDev](https://pkg.go.dev/badge/github.com/vultr/govultr/v2)](https://pkg.go.dev/github.com/vultr/govultr/v2)
-[![codecov](https://codecov.io/gh/vultr/govultr/branch/master/graph/badge.svg?token=PDJXBc7Rci)](https://codecov.io/gh/vultr/govultr)
+[![Unit/Coverage Tests](https://github.com/vultr/govultr/actions/workflows/coverage.yml/badge.svg)](https://github.com/vultr/govultr/actions/workflows/coverage.yml)
 [![Go Report Card](https://goreportcard.com/badge/github.com/vultr/govultr)](https://goreportcard.com/report/github.com/vultr/govultr)
 
 The official Vultr Go client - GoVultr allows you to interact with the Vultr V2 API.