COMP: Upgrade ITK from v5.1.1 to v5.2.0

Upgraded to ITK version 5.2.0, which was released on May 28, 2021.

ITK 5.2.0 fixed a critical issue, with commit  InsightSoftwareConsortium/ITK@7cebc26 "COMP: Fix OpenJPEG build error with Visual Studio 16.9", by James Butler (jamesobutler) and spacelg

Following pull request SuperElastix/SimpleElastix#425 and SuperElastix/SimpleElastix#428 by David Young (yoda-vid)

Obviously, ITK 5.2.0 has many other improvements: https://github.com/InsightSoftwareConsortium/ITK/releases/tag/v5.2.0

Author: N-Dekker

CMakeLists.txt

@@ -29,7 +29,7 @@ if(ELASTIX_USE_OPENCL)
 endif()
 
 # Find ITK.
-find_package( ITK 5.1.1 REQUIRED COMPONENTS
+find_package( ITK 5.2.0 REQUIRED COMPONENTS
     ITKCommon
     ITKDisplacementField
     ITKDistanceMap

Testing/CI/Azure/ci.yml

@@ -1,5 +1,5 @@
 variables:
-  ITKv5_VERSION: v5.1.1
+  ITKv5_VERSION: v5.2.0
   ITK_GIT_URL: https://github.com/InsightSoftwareConsortium/ITK
   ITK_SOURCE_DIR: $(Agent.BuildDirectory)/ITK-source
   ITK_BINARY_DIR: $(Agent.BuildDirectory)/ITK-build