replace deprecated FILTER_SANITIZE_STRING (#126)

[stklcode]

resolves #126

In the following method check_theme_file() URL sanitization is applied, so we can either use FILTER_SANITIZE_URL here as well or simply pass UNSAFE_RAW in this case.

antivirus/inc/class-antivirus-checkinternals.php

Lines 83 to 87 in e55943c

	public static function check_theme_file( $file ) {
	// Simple file path check.
	if ( filter_var( $file, FILTER_SANITIZE_URL ) !== $file ) {
	return false;
	}

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[Zodiac1978]

Makes sense!
LGTM.

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (7fd71df) 36.30% compared to head (5a7e857) 36.30%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             develop     #127   +/-   ##
==========================================
  Coverage      36.30%   36.30%           
  Complexity       147      147           
==========================================
  Files              5        5           
  Lines            774      774           
==========================================
  Hits             281      281           
  Misses           493      493           

Files	Coverage Δ
inc/class-antivirus.php	17.74% <0.00%> (ø)

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