Extend MDTagRelationType by taxon, mentioned subject and topic

Close #41, close #42

src/enums/MDTagRelationType.php

@@ -18,6 +18,9 @@ enum MDTagRelationType implements MDValueEnumInterface, JsonSerializable {
     case material;
     case technique;
     case display_subject;
+    case topic;
+    case mentioned;
+    case taxon;
 
     /**
      * Returns a value of this type based on a string.
@@ -34,6 +37,9 @@ enum MDTagRelationType implements MDValueEnumInterface, JsonSerializable {
             'material' => self::material,
             'technique' => self::technique,
             'display_subject' => self::display_subject,
+            'topic' => self::topic,
+            'mentioned' => self::mentioned,
+            'taxon' => self::taxon,
             default => throw new MDpageParameterNotFromListException("Unknown tag relation type"),
         };
 
@@ -54,6 +60,9 @@ enum MDTagRelationType implements MDValueEnumInterface, JsonSerializable {
             2 => self::material,
             3 => self::technique,
             4 => self::display_subject,
+            5 => self::topic,
+            6 => self::mentioned,
+            7 => self::taxon,
             default => throw new MDpageParameterNotFromListException("Unknown tag relation type"),
         };
 
@@ -119,6 +128,9 @@ enum MDTagRelationType implements MDValueEnumInterface, JsonSerializable {
             self::material => 2,
             self::technique => 3,
             self::display_subject => 4,
+            self::topic => 5,
+            self::mentioned => 6,
+            self::taxon => 7,
             // default => throw new MDpageParameterNotFromListException("Unknown tag relation type"),
         };