chore: updated README.md

Modifiy GitHub Actions status badges.
Remove Travis CI status badge.
Remove CircleCI status badge.

README.md

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 [![crates.io](https://img.shields.io/crates/v/fitting.svg)](https://crates.io/crates/fitting)
 [![docs.rs](https://docs.rs/fitting/badge.svg)](https://docs.rs/fitting)
-[![Actions Status](https://github.com/mshrtsr/fitting-rs/workflows/Rust/badge.svg)](https://github.com/mshrtsr/fitting-rs/actions)
-[![CircleCI](https://circleci.com/gh/mshrtsr/fitting-rs.svg?style=shield)](https://circleci.com/gh/mshrtsr/fitting-rs)
-[![Build Status](https://travis-ci.com/mshrtsr/fitting-rs.svg?branch=master)](https://travis-ci.org/mshrtsr/fitting-rs)
+[![Build and Test](https://github.com/mshrtsr/fitting-rs/workflows/Build%20and%20Test/badge.svg)](https://github.com/mshrtsr/fitting-rs/actions?query=workflow%3A%22Build+and+Test%22)
+[![Format and Lint](https://github.com/mshrtsr/fitting-rs/workflows/Format%20and%20Lint/badge.svg)](https://github.com/mshrtsr/fitting-rs/actions?query=workflow%3A%22Format+and+Lint%22)
 [![codecov](https://codecov.io/gh/mshrtsr/fitting-rs/branch/master/graph/badge.svg)](https://codecov.io/gh/mshrtsr/fitting-rs)
 
 Curve fitting library for Rust