Merge pull request #590 from hackingmaterials/dependabot/pip/pymatgen-2021.2.16

Author: dependabot-preview[bot]

requirements.txt

@@ -8,7 +8,7 @@ tqdm==4.56.2
 pybtex==0.24.0
 ruamel.yaml==0.16.12
 pandas==1.2.2
-pymatgen==2021.2.14
+pymatgen==2021.2.16
 custodian==2021.2.8
 networkx==2.5
 pydash==4.9.2