Add GitLab CI

• Different set of boxes, there isn't a 7.2 in the current series and doesn't seem like that'll changes
• Correct PHPUnit version for PHP version, as Travis handles

Fixes #2 (closed)

.gitlab-ci.yml

@@ -14,7 +14,7 @@ before_script:
   - |
     apt-get -yqqf install zip unzip subversion mysql-client --fix-missing
 
-    if [[ $(lsb_relase -a) =~ "stretch" ]]; then
+    if [[ $(lsb_release -a) =~ "stretch" ]]; then
       apt-get -yqqf install default-libmysqlclient-dev --fix-missing
     else
       apt-get -yqqf install libmysqlclient-dev --fix-missing
@@ -32,7 +32,7 @@ before_script:
 
   # PHPUnit
   - |
-    if [[ $(php -v) =~ "^PHP 7" ]]; then
+    if [[ $(php -v) =~ "^PHP 7\." ]]; then
       php composer.phar global require "phpunit/phpunit=6.1.*"
     else
       php composer.phar global require "phpunit/phpunit=4.8.*"