Bump pymatgen from 2022.0.5 to 2022.0.8 in /emmet-core

Bumps [pymatgen](https://github.com/materialsproject/pymatgen) from 2022.0.5 to 2022.0.8.
- [Release notes](https://github.com/materialsproject/pymatgen/releases)
- [Changelog](https://github.com/materialsproject/pymatgen/blob/master/CHANGES.rst)
- [Commits](materialsproject/pymatgen@v2022.0.5...v2022.0.8)

Signed-off-by: dependabot[bot] <support@github.com>

emmet-core/requirements.txt

@@ -1,4 +1,4 @@
-pymatgen==2022.0.5
+pymatgen==2022.0.8
 monty==v2021.3.3
 pydantic==1.8.1
 pybtex==0.24.0

emmet-core/setup.py

@@ -14,7 +14,7 @@
     url="https://github.com/materialsproject/emmet",
     packages=find_namespace_packages(include=["emmet.*"]),
     install_requires=[
-        "pymatgen~=2021.3",
+        "pymatgen>=2021.3,<2023.0",
         "monty~=2021.3",
         "pydantic[email]~=1.8",
         "pybtex~=0.24",