fix (some) php 8.1 deprecations

[slepic]

Prevents

PHP Deprecated: Implicit conversion from float 22.5 to int loses precision in /app/vendor/o5/grido/src/Components/Columns/Column.php:339

in PHP >= 8.1

[slepic]

Also prevents:

Deprecated: strip_tags(): Passing null to parameter #1 ($string) of type string is deprecated

in Column::renderExport()

[slepic]

Also

Deprecated: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated

in Export::printCsv()

[peterpp]

@o5 , could you merge these fixes? They look good to me.

[slepic]

@peterpp i also have php 8.2 branch if you're interested. Just point to my fork in your composer.json