Update CMakeLists.txt (#123)

- minimum cmake version: 3.8
- use default C++17

Co-authored-by: Robert Haschke <rhaschke@techfak.uni-bielefeld.de>

CMakeLists.txt

@@ -1,11 +1,6 @@
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.8)
 project(srdfdom LANGUAGES CXX)
 
-# Default to C++14
-if(NOT CMAKE_CXX_STANDARD)
-  set(CMAKE_CXX_STANDARD 14)
-endif()
-
 if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
   add_compile_options(-Wall -Wextra -Wpedantic)
 endif()