Been missing conda on activate this whole time

Author: jmwright

appveyor.yml

@@ -25,7 +25,7 @@ install:
     - conda config --set always_yes yes --set changeps1 no
     - conda update -q conda
     - conda env create -f environment.yml
-    - activate cadquery
+    - conda activate cadquery
     - pip install git+https://github.com/CadQuery/[email protected]
 
 build: false