Install theano in github workflow

Author: aseyboldt

.github/workflows/main.yml

@@ -64,7 +64,7 @@ jobs:
     - name: Install build and test dependencies
       shell: cmd /C call {0}
       run: |
-        conda install conda-build conda-verify coverage pytest pytest-cov hypothesis statsmodels sundials
+        conda install conda-build conda-verify coverage pytest pytest-cov hypothesis statsmodels sundials theano
     - name: Sunode build
       shell: cmd /C call {0}
       run: |