Update conda env for c++

Following new example added with csdms/babelizer#105 and shown (for now) in https://babelizer.readthedocs.io/en/mdpiper-add-cxx-example/example-cxx.html

environment.yml

@@ -3,15 +3,17 @@ name: wrap-all
 channels:
   - conda-forge
 dependencies:
-  - python=3
+  - python>=3.10
   - make
   - cmake
   - pkg-config
   - c-compiler
   - bmi-c
+  - cxx-compiler
+  - bmi-cxx
   # - fortran-compiler
   # - bmi-fortran
-  # - babelizer  # installs latest release
+  # - babelizer  # installs latest release. pip install below for dev
   - bmi-tester
   - pymt>=1.3
   - gimli.units=0.3.1 # Before reorg (https://github.com/mcflugen/gimli/pull/18) 
@@ -23,4 +25,5 @@ dependencies:
   # PIP install requirements only if it is not  possible with conda
   - pip
   - pip:
-    - git+https://github.com/csdms/babelizer.git@develop  # installs head of branch
+    # - -e git+https://github.com/csdms/babelizer.git@develop  # installs head of branch
+    - -e git+https://github.com/csdms/babelizer.git@mdpiper/add-cxx-example