Drop TravisCI

Signed-off-by: William Desportes <williamdes@wdes.fr>

Author: williamdes

.gitattributes

@@ -1,7 +1,6 @@
 /ci export-ignore
 .gitattributes export-ignore
 .gitignore export-ignore
-.travis.yml export-ignore
 .github export-ignore
 .scrutinizer.yml export-ignore
 codecov.yml export-ignore

.travis.yml

@@ -1,7 +1,7 @@
 # shapefile
 ShapeFile library for PHP
 
-[![Build Status](https://travis-ci.org/phpmyadmin/shapefile.svg?branch=master)](https://travis-ci.org/phpmyadmin/shapefile)
+![Test-suite](https://github.com/phpmyadmin/shapefile/workflows/Run%20tests/badge.svg?branch=master)
 [![codecov.io](https://codecov.io/github/phpmyadmin/shapefile/coverage.svg?branch=master)](https://codecov.io/github/phpmyadmin/shapefile?branch=master)
 [![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/phpmyadmin/shapefile/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/phpmyadmin/shapefile/?branch=master)
 [![Packagist](https://img.shields.io/packagist/dt/phpmyadmin/shapefile.svg)](https://packagist.org/packages/phpmyadmin/shapefile)
@@ -19,14 +19,14 @@ making translations or offering new ideas please contact us.
 
 Please use [Composer][1] to install:
 
-```
+```sh
 composer require phpmyadmin/shapefile
 ```
 
 To be able to read and write the associated DBF file, you need ``dbase``
 extension:
 
-```
+```sh
 pecl install dbase
 echo "extension=dbase.so" > /etc/php7/conf.d/dbase.ini
 ```