[dev] update xtensor>=0.26, xtl>=0.8

Author: Roy-Kid

CMakeLists.txt

@@ -96,7 +96,7 @@ set(CMAKE_CXX_EXTENSIONS NO)
 include_directories(${XTENSOR_FFTW_INCLUDE_DIR})
 
 # .. xtl
-set(xtl_REQUIRED_VERSION 0.6.9)
+set(xtl_REQUIRED_VERSION 0.8.0)
 if(TARGET xtl)
     set(xtl_VERSION ${XTL_VERSION_MAJOR}.${XTL_VERSION_MINOR}.${XTL_VERSION_PATCH})
     # Note: This is not SEMVER compatible comparison
@@ -111,7 +111,7 @@ else()
 endif()
 
 # .. xtensor
-set(xtensor_REQUIRED_VERSION 0.20.9)
+set(xtensor_REQUIRED_VERSION 0.26.0)
 if(TARGET xtensor)
     set(xtensor_VERSION ${XTENSOR_VERSION_MAJOR}.${XTENSOR_VERSION_MINOR}.${XTENSOR_VERSION_PATCH})
     # Note: This is not SEMVER compatible comparison