updated requirements

Author: mbarber

openprotein/_version.py

@@ -1,3 +1,6 @@
-from importlib.metadata import version
+try:
+    from importlib.metadata import version
+except ImportError:
+    from importlib_metadata import version # py 3.7
 
 __version__ = version("openprotein-python")

pyproject.toml

@@ -13,7 +13,7 @@ classifiers = [
 ]
 
 [tool.poetry.dependencies]
-python = "^3.7"
+python = "^3.8"
 requests = ">=2"
 pydantic = ">=1"
 tqdm = ">=4"