Bumped version to v2.9

Author: p-ranav

CMakeLists.txt

@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.12.4)
 
 project(argparse
-        VERSION 2.8.0 
+        VERSION 2.9.0 
         DESCRIPTION "A single header argument parser for C++17"
         HOMEPAGE_URL "https://github.com/p-ranav/argparse"
         LANGUAGES CXX

README.md

@@ -7,7 +7,7 @@
   <a href="https://github.com/p-ranav/argparse/blob/master/LICENSE">
     <img src="https://img.shields.io/badge/License-MIT-yellow.svg" alt="license"/>
   </a>
-  <img src="https://img.shields.io/badge/version-2.8-blue.svg?cacheSeconds=2592000" alt="version"/>
+  <img src="https://img.shields.io/badge/version-2.9-blue.svg?cacheSeconds=2592000" alt="version"/>
 </p>
 
 ## Highlights

conanfile.py

@@ -2,7 +2,7 @@
 
 class ArgparseConan(ConanFile):
     name = "argparse"
-    version = "2.8"
+    version = "2.9"
     exports_sources = "include/argparse.hpp"
     no_copy_source = True