add PHP 8.4 compatibility (#26)

Author: dmryabov

composer.json

@@ -13,7 +13,7 @@
     }
   ],
   "require": {
-    "php": ">=7.0",
+    "php": ">=7.1",
     "ltd-beget/stringstream" : "^1.0 || ^2.0"
   },
   "require-dev": {

src/LTDBeget/dns/SyntaxErrorException.php

@@ -37,7 +37,7 @@ class SyntaxErrorException extends \RuntimeException
      * @param int            $code
      * @param Exception|null $previous
      */
-    public function __construct(StringStream $stream, int $code = 0, Exception $previous = NULL)
+    public function __construct(StringStream $stream, int $code = 0, ?Exception $previous = NULL)
     {
         if ($stream->isEnd()) {
             $stream->end();
@@ -101,4 +101,4 @@ public function getUnexpectedChar()
     {
         return $this->unexpected_char;
     }
-}
+}

src/LTDBeget/dns/record/Record.php

@@ -56,10 +56,10 @@ class Record
     public function __construct
     (
         StringStream $stream,
-        string $globalOrigin = NULL,
-        string $globalTtl = NULL,
+        ?string $globalOrigin = NULL,
+        ?string $globalTtl = NULL,
         bool $isFirst = false,
-        string $previousName = NULL
+        ?string $previousName = NULL
     )
     {
         $this->stream       = $stream;
@@ -103,12 +103,12 @@ public function tokenize() : array
             }
             goto in;
         }
-        
+
         $this->defaultExtractor('TTL');
         $this->stream->ignoreHorizontalSpace();
         in:
         $this->extractClass();
-        
+
         $this->stream->ignoreHorizontalSpace();
         $this->extractRData();
 
@@ -119,7 +119,7 @@ public function tokenize() : array
                 $this->tokens['NAME'] .= '.'.$this->globalOrigin;
             }
         }
-        
+
         return $this->tokens;
     }
 
@@ -170,11 +170,11 @@ private function extractClass()
             $this->stream->next();
             if ($this->stream->currentAscii()->is(AsciiChar::N_UPPERCASE)) {
                 $this->stream->next();
-                
+
                 $this->stream->ignoreHorizontalSpace();
                 $this->defaultExtractor('TYPE');
                 $this->stream->ignoreHorizontalSpace();
-            
+
             } else {
                 throw new SyntaxErrorException($this->stream);
             }
@@ -228,4 +228,4 @@ private function extractRData()
     {
         $this->tokens['RDATA'] = (new RData($this->stream, $this->tokens['TYPE']))->tokenize();
     }
-}
+}