Remove Travis CI with Github Actions

.travis.yml

@@ -1,9 +0,0 @@
-language: rust
-cache: cargo
-rust:
-    - stable
-    - beta
-    - nightly
-matrix:
-    allow_failures:
-        - rust: nightly

README.md

@@ -1,6 +1,6 @@
 # rosc
 
-[![Build Status](https://travis-ci.org/klingtnet/rosc.svg?branch=master)](https://travis-ci.org/klingtnet/rosc)
+[![Build Status](https://github.com/klingtnet/rosc/workflows/Rust/badge.svg)](https://github.com/klingtnet/rosc/actions)
 ![license](https://img.shields.io/badge/license-MIT%2FApache%202.0-blue.svg)
 [![Crates.io](https://img.shields.io/crates/v/rosc.svg)](https://crates.io/crates/rosc) [![rustdoc](https://img.shields.io/badge/rustdoc-hosted-blue.svg)](https://docs.rs/rosc)
 [![dependency status](https://deps.rs/repo/github/klingtnet/rosc/status.svg)](https://deps.rs/repo/github/klingtnet/rosc)