Merge pull request #17 from kinow/dependabot/pip/protobuf-gte-3.13-an…

…d-lt-3.16

Update protobuf requirement from ==3.13.* to >=3.13,<3.16

setup.py

@@ -28,7 +28,7 @@ def read(*parts):
 install_requires = [
     "click==7.1.*",
     "graphviz>=0.14,<0.17",
-    "protobuf==3.13.*"
+    "protobuf>=3.13,<3.16"
 ]
 
 setup_requires = [