[C++]: Fixed version regexp bug, now allow multi-digit version components

Author: didenko

CMakeLists.txt

@@ -17,8 +17,8 @@
 cmake_minimum_required(VERSION 3.0.2 FATAL_ERROR)
 cmake_policy(VERSION 3.0.2)
 
-file(STRINGS version.txt SBE_VERSION_TXT LIMIT_COUNT 1 REGEX "^[0-9]+(\\.[0-9])+")
-string(REGEX REPLACE "^([0-9]+(\\.[0-9])+).*$" "\\1" SBE_VERSION_NUMERIC "${SBE_VERSION_TXT}")
+file(STRINGS version.txt SBE_VERSION_TXT LIMIT_COUNT 1 REGEX "^[0-9]+(\\.[0-9]+)+")
+string(REGEX REPLACE "^([0-9]+(\\.[0-9]+)+).*$" "\\1" SBE_VERSION_NUMERIC "${SBE_VERSION_TXT}")
 
 project("sbe" VERSION "${SBE_VERSION_NUMERIC}")