Fixes PHP 8.1 E_DEPRECATED in GitHub Template (#23)

If no longDescription, `null` is passed to `str_replace()`,
which is deprecated now in PHP 8.  Casting value to
string to avoid the E_DEPRECATED.

Strip hard line break in method summaries (#19)

Update .travis.yml

update php dependecies

travis build process change

update php dependencies

fix PHP Notice: Undefined property: stdClass::... during render view

update php dependecies

php7 and new phpunit dependencies supported

support for native php methods names