fix dependencies

.github/workflows/testing.yml

@@ -36,6 +36,7 @@ jobs:
           cache-dependency-path: "**/requirements.txt"
       - name: Install dependencies
         run: |
+          pip install git+https://github.com/materialsvirtuallab/maml.git
           pip install --quiet -r requirements.txt -r requirements-ci.txt
           pip install -e '.[models]'
       - name: pytest

citation.cff

@@ -1,7 +1,7 @@
 # cff-version: 1.2.0
 message: If you use MatCalc, please cite it as follows.
 title: MatCalc
-subtitle: A Python library for calculating materials properties
+subtitle: A Python library for calculating materials properties from the potential energy surface (PES)
 authors:
   - given-names: Runze
     family-names: Liu