Fix placeholders detection with multiline strings

[b-viguier]

Fix #657

In #651, I included the . to mach any character. Actually, it matches any character except newline 😅

Here are several workarounds from stackoverflow

I choose to replace . by (?s:.), because it locally changes the regex flag to also match newline character, without adding too much noise....

Added a test 🎁

[staabm]

Thanks!

@mitelg could you confirm this works for you

[mitelg]

can confirm :heavy_check_mark:

thanks for the fix @b-viguier :+1:

[staabm]

fix released in https://github.com/staabm/phpstan-dba/releases/tag/0.2.81

thank you guys!