Prepare for release v4.22 (#73)

* Update CMakeLists.txt

* Update release.txt

* Update SimpleIni.h

Author: brofield

CMakeLists.txt

@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.14)
 
 project(
 	SimpleIni
-	VERSION 4.20
+	VERSION 4.22
 	DESCRIPTION "Cross-platform C++ library providing a simple API to read and write INI-style configuration files"
 	LANGUAGES CXX
 )

SimpleIni.h

@@ -5,7 +5,7 @@
         <tr><th>File        <td>SimpleIni.h
         <tr><th>Author      <td>Brodie Thiesfield
         <tr><th>Source      <td>https://github.com/brofield/simpleini
-        <tr><th>Version     <td>4.21
+        <tr><th>Version     <td>4.22
     </table>
 
     Jump to the @link CSimpleIniTempl CSimpleIni @endlink interface documentation.

release.txt

@@ -2,5 +2,5 @@ Making a release:
 * update version number in SimpleIni.h
 * update version number in CMakeLists.txt
 * check-in all files
-* make a release "v4.20" etc creating a matching tag
+* make a release "v4.22" etc creating a matching tag