check for escaped double quotes in local part (#102)

src/Egulias/EmailValidator/Parser/LocalPart.php

@@ -92,6 +92,9 @@ class LocalPart extends Parser
                 $this->warnings[CFWSWithFWS::CODE] = new CFWSWithFWS();
                 $setSpecialsWarning = false;
             }
+            if ($this->lexer->token['type'] === EmailLexer::S_BACKSLASH && $this->lexer->isNextToken(EmailLexer::S_DQUOTE)) {
+                $this->lexer->moveNext();
+            }
 
             $this->lexer->moveNext();
 

tests/egulias/Tests/EmailValidator/Validation/RFCValidationTest.php

@@ -85,6 +85,7 @@ class RFCValidationTest extends \PHPUnit_Framework_TestCase
             ['"user,name"@example.com'],
             ['"user name"@example.com'],
             ['"user@name"@example.com'],
+            ['"user\"name"@example.com'],
             ['"\a"@iana.org'],
             ['"test\ test"@iana.org'],
             ['""@iana.org'],