Add Creation Date

+# 1.3.7
+* Add Pdf Creation date
+
 # 1.3.6
 * Fix TTF Font SubSetting
 

@@ -47,6 +47,8 @@ class PdfInfo extends PdfObject {
     } else {
       params['/Producer'] = PdfStream()..putLiteral(_libraryName);
     }
+
+    params['/CreationDate'] = PdfStream()..putDate(DateTime.now());
   }
 
   static const String _libraryName = 'https://github.com/DavBfr/dart_pdf';

@@ -144,6 +144,17 @@ class PdfStream {
     putString('[' + values.join(' ') + ']');
   }
 
+  void putDate(DateTime date) {
+    final DateTime utcDate = date.toUtc();
+    final String year = utcDate.year.toString().padLeft(4, '0');
+    final String month = utcDate.month.toString().padLeft(2, '0');
+    final String day = utcDate.day.toString().padLeft(2, '0');
+    final String hour = utcDate.hour.toString().padLeft(2, '0');
+    final String minute = utcDate.minute.toString().padLeft(2, '0');
+    final String second = utcDate.second.toString().padLeft(2, '0');
+    putText("D:${year}${month}${day}${hour}${minute}${second}Z");
+  }
+
   void putNumArray(List<double> values) {
     putString('[');
     putNumList(values);

@@ -4,7 +4,7 @@ description: A pdf producer for Dart. It can create pdf files for both web or fl
 homepage: https://github.com/DavBfr/dart_pdf/tree/master/pdf
 repository: https://github.com/DavBfr/dart_pdf
 issue_tracker: https://github.com/DavBfr/dart_pdf/issues
-version: 1.3.6
+version: 1.3.7
 
 environment:
   sdk: ">=2.1.0 <3.0.0"