Google Test Framework Online Version: Switch Branch from Master to Ma…

…in (#13)

* Change GIT_TAG from master to main
Why?
- Google renamed their branches from Master to Main
Changes to be committed:
	modified:   CMakeLists.txt.in

* Change the comment in the Google test online version cmake

CMakeLists.txt.in

@@ -1,12 +1,12 @@
-# This file is from https://github.com/google/googletest/tree/master/googletest
+# This file is from https://github.com/google/googletest/tree/main/googletest
 cmake_minimum_required(VERSION 2.8.2)
 
 project(googletest-download NONE)
 
 include(ExternalProject)
 ExternalProject_Add(googletest
   GIT_REPOSITORY    https://github.com/google/googletest.git
-  GIT_TAG           master
+  GIT_TAG           main
   SOURCE_DIR        "${CMAKE_BINARY_DIR}/googletest-src"
   BINARY_DIR        "${CMAKE_BINARY_DIR}/googletest-build"
   CONFIGURE_COMMAND ""

cmake/FindGoogleTestFrameworkOnlineVersion.cmake

@@ -1,7 +1,7 @@
 # FindGoogleTestFrameworkOnlineVersion.cmake
 # 
 #   Created on: Jan 30, 2019
-#       Source: https://github.com/google/googletest/tree/master/googletest 
+#       Source: https://github.com/google/googletest/tree/main/googletest 
 # 
 # Requirements      
 #   * CMake 2.8. or later due to the use of ExternalProject_Add().