Install with XEUS on all platforms

Add the necessary dependencies.

.gitlab-ci.yml

@@ -222,7 +222,7 @@ build.xsh:
     - export PATH="$HOME/conda_root/bin:$PATH"
     - sudo apt-get update
     - sudo apt-get install -yq --no-install-recommends zlib1g-dev git
-    - conda install -c conda-forge llvmdev=9.0.1 toml
+    - conda install -c conda-forge llvmdev=9.0.1 toml pytest jupyter xeus xtl nlohmann_json cppzmq jupyter_kernel_test
     - export LFORTRAN_CMAKE_GENERATOR="Unix Makefiles"
     - export WIN=0
     - export MACOS=0

appveyor.yml

@@ -8,7 +8,7 @@ build_script:
 - call conda config --set always_yes yes --set changeps1 no
 - call conda info -a
 - call conda update -q conda
-- call conda install -c conda-forge python=3.7 re2c m2-bison xonsh scikit-build llvmdev=8.0.0
+- call conda install -c conda-forge python=3.7 re2c m2-bison xonsh scikit-build llvmdev=8.0.0 jupyter xeus xtl nlohmann_json cppzmq jupyter_kernel_test pytest
 - set CONDA_PREFIX=C:\\Miniconda37-x64
 - set WIN=1
 - set MACOS=0

ci/azure_install_macos.sh

@@ -5,7 +5,7 @@ set -ex
 conda config --set always_yes yes --set changeps1 no
 conda info -a
 conda update -q conda
-conda install -c conda-forge python=3.7 re2c bison m4 xonsh scikit-build llvmdev=9.0.1 toml cmake=3.17.0
+conda install -c conda-forge python=3.7 re2c bison m4 xonsh scikit-build llvmdev=9.0.1 toml cmake=3.17.0 jupyter pytest xeus xtl nlohmann_json cppzmq jupyter_kernel_test
 export MACOSX_DEPLOYMENT_TARGET="10.9"
 export CONDA_PREFIX=/usr/local/miniconda
 export LFORTRAN_CMAKE_GENERATOR="Unix Makefiles"

ci/build.xsh

@@ -50,7 +50,7 @@ cd test-bld
 # compiled in Release mode and we get link failures if we mix and match build
 # modes:
 BUILD_TYPE = "Release"
-cmake -G $LFORTRAN_CMAKE_GENERATOR -DCMAKE_VERBOSE_MAKEFILE=ON -DWITH_LLVM=yes -DCMAKE_PREFIX_PATH=$CONDA_PREFIX -DCMAKE_BUILD_TYPE=@(BUILD_TYPE) ..
+cmake -G $LFORTRAN_CMAKE_GENERATOR -DCMAKE_VERBOSE_MAKEFILE=ON -DWITH_LLVM=yes -DWITH_XEUS=yes -DCMAKE_PREFIX_PATH=$CONDA_PREFIX -DCMAKE_BUILD_TYPE=@(BUILD_TYPE) ..
 cmake --build .
 ./src/lfortran/tests/test_llvm -s
 ./src/bin/lfortran < ../src/bin/example_input.txt