fix #92 Datamatrix GS1 <GS> separator

Author: nicolaasuni

VERSION

@@ -1 +1 @@
-2.4.26
+2.4.27

src/Type/Square/Datamatrix.php

@@ -253,7 +253,7 @@ protected function getHighLevelEncoding(string $data): array
                     $cco == 232   // FNC1 (ASCII 232 - HEX \xE8)
                     || $cco == 29 // <GS> (ASCII  29 - HEX \x1D)
                 ) {
-                    $cdw[] = $cco; // don't encode, just pass it through.
+                    $cdw[] = 232; // FNC1
                     ++$pos;
                     ++$cdw_num;
                     continue;

test/Square/DatamatrixTest.php

@@ -422,17 +422,33 @@ public static function getGridDataProvider(): array
                 '8b4f688a774130bc654e39dfcfadb482'
             ],
             [
-                'DATAMATRIX,S,GS1,C40',
+                'DATAMATRIX,S,GS1',
                 // \xE8 is the control character FNC1 (ASCII 232)
-                "\xE8" . '01095011010209171719050810ABCD1234' . "\xE8" . '2110',
-                'ba117111dfa40a40e1bb968c719d2eef'
+                // Expected read:
+                //     (01)03453120000011
+                //     (17)191125
+                //     (10)ABCD1234
+                //     (21)10
+                "\xE8" . '01034531200000111719112510ABCD1234' . "\xE8" . '2110',
+                '3c66c6c7355e7dea071501216e894eac'
             ],
             [
                 'DATAMATRIX,S,GS1',
                 // \xE8 is the control character FNC1 (ASCII 232)
                 // \x1D is the control character <GS> (ASCII 29)
-                "\xE8" . '01095011010209171719050810ABCD1234' . "\x1D" . '2110',
-                'cc096c94e0e2d88e8c50e3fdccef60ce'
+                // Expected read:
+                //     (01)03453120000011
+                //     (17)191125
+                //     (10)ABCD1234
+                //     (21)10
+                "\xE8" . '01034531200000111719112510ABCD1234' . "\x1D" . '2110',
+                '3c66c6c7355e7dea071501216e894eac'
+            ],
+            [
+                'DATAMATRIX,S,GS1,C40',
+                // \xE8 is the control character FNC1 (ASCII 232)
+                "\xE8" . '01095011010209171719050810ABCD1234' . "\xE8" . '2110',
+                'ba117111dfa40a40e1bb968c719d2eef'
             ]
         ];
     }