Release 2.0.8

Changes (since 2.0.7...2.0.8)

• feature #83 Reduce memory usage of geoip2:update (@mreiden)
• bug #81 Optimize docs for get GeoIP data in client locale (@peter-gribanov)
• bug #80 Update configuration docs (@peter-gribanov)
• bug #78 Сorrect help text of UpdateDatabaseCommand (@peter-gribanov)
• bug #79 Rename .php-cs-fixer.dist.php file for PHP-CS-Fixer (@peter-gribanov)