Trying to use bash specifically for Linux and MacOS

Author: jmwright

appveyor.yml

@@ -28,7 +28,7 @@ install:
     - conda config --set always_yes yes --set changeps1 no
     - conda update -q conda
     - cmd: conda init
-    - sh: conda init $SHELL
+    - sh: conda init bash
     - conda env create -f environment.yml
     - conda activate cadquery
     - pip install git+https://github.com/CadQuery/[email protected]