Merge pull request #261 from JohanMabille/upgrade_xeus

Upgraded to xeus 4

Author: JohanMabille

CMakeLists.txt

@@ -72,7 +72,7 @@ option(XWIDGETS_BUILD_STATIC_LIBS "Build xwidgets static library (default if BUI
 # ============
 
 set(xtl_REQUIRED_VERSION 0.7.0)
-set(xeus_REQUIRED_VERSION 3.2.0)
+set(xeus_REQUIRED_VERSION 5.0.0)
 set(xproperty_REQUIRED_VERSION 0.11.0)
 
 if(NOT TARGET xtl)

environment-dev.yml

@@ -7,10 +7,9 @@ dependencies:
 - cxx-compiler
 - ninja
   # Host dependencies
-- xeus>=3.2.0,<4
-- cppzmq
+- xeus>=5.0.0,<6
 - xproperty=0.11.0
-- nlohmann_json
+- nlohmann_json=3.11.3
   # Test dependencies
 - doctest >= 2.4.6
 - json_schema_validator