Add PB type

Records.cs

@@ -22,7 +22,7 @@ namespace Txt2Bib.Records
             a = a.Trim();
             var s = a.Split(' ');
             return s.Length > 1 ? 
-                $"{s[1]} {s[0][0]}{s[0][1..].ToLowerInvariant()}" : a;
+                $"{s[1]} {s[0][0]}{s[0][1..].ToLower()}" : a;
         }
 
         protected string CreatePages(string pages)

Text2Bib.cs

@@ -15,7 +15,7 @@ namespace Txt2Bib
     /// </summary>
     public class Text2Bib
     {
-        private readonly string[] _citTypes = { "J", "B", "C", "P" };
+        private readonly string[] _citTypes = { "J", "B", "C", "P", "PB" };
         
         /// <summary>
         /// Generate single .bib file from input text files
@@ -85,6 +85,7 @@ namespace Txt2Bib
                 {
                     "J" => new Article().Convert(lines),
                     "B" => new Book().Convert(lines),
+                    "PB" => new Book().Convert(lines),
                     "C" => new Chapter().Convert(lines),
                     "P" => new Proceedings().Convert(lines),
                     _ => ""

Txt2Bib.csproj

@@ -5,7 +5,7 @@
     <TargetFramework>net6.0-windows</TargetFramework>
     <Nullable>enable</Nullable>
     <UseWPF>true</UseWPF>
-    <Version>0.1.9</Version>
+    <Version>0.2.0</Version>
   </PropertyGroup>
 
   <ItemGroup>