Use a safe way to execute dns_get_record (v3) (#286)

* #256 Bypass a PHP warning generated by @dns_get_record

The idea is to create a custom error handler for dns_get_record(), call dns_get_record and then restore the original error handler.
This way we can catch PHP warnings (e.g. "Warning: dns_get_record(): DNS Query failed" or "dns_get_record(): A temporary server error occurred." [ErrorException])

* #256 Make `UnableToGetDNSRecord` reason more testable

* #256 Suppress psalm’s false-positive error

see https://github.com/vimeo/psalm/issues/5134#issuecomment-782937791

* #256 Speed up tests: start from previously failed

* #256 Suppress psalm’s false-positive error

We don’t have a control over AbstractLexer and can’t specify array shape in this parent class

phpunit.xml.dist

@@ -1,14 +1,17 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
-<phpunit backupGlobals="false"
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="./vendor/phpunit/phpunit/phpunit.xsd"
+         backupGlobals="false"
          backupStaticAttributes="false"
+         bootstrap="vendor/autoload.php"
          colors="true"
          convertErrorsToExceptions="true"
          convertNoticesToExceptions="true"
          convertWarningsToExceptions="true"
+         executionOrder="defects"
          processIsolation="false"
          stopOnFailure="false"
-         bootstrap="vendor/autoload.php"
 >
 <testsuites>
   <testsuite name="EmailValidator Test Suite">