README contains link to Travis-CI which is no longer available

[ryandesign]

README contains a link to Travis-CI using a badge which now reads "CI | No longer available":

libemulation/README.md

Line 4 in f97f504

<a href="https://raw.githubusercontent.com/openemulator/libemulation/master/COPYING"><img alt="GitHub" src="https://img.shields.io/github/license/openemulator/libemulation.svg?label=License&style=for-the-badge"> </a> <a href="https://travis-ci.org/openemulator/libemulation"><img alt="Travis (.org)" src="https://img.shields.io/travis/openemulator/libemulation.svg?label=CI&logo=travis&logoColor=white&style=for-the-badge"></a> <a href="https://gitter.im/openemulator/community"><img alt="Gitter" src="https://img.shields.io/gitter/room/openemulator/community.svg?color=blue&logo=gitter&style=for-the-badge"></a>

It should be removed or replaced with some still-working CI like GitHub Actions.