Revert type annotations to allow installations for Python<3.9

Author: nicholasjng

pybm/commands/run.py

@@ -133,7 +133,7 @@ def run(self, args: List[str]) -> int:
         runner: BenchmarkRunner = get_runner_class(config=self.config)
 
         verbose: bool = options.verbose
-        env_ids: list[str] = options.environments or []
+        env_ids: List[str] = options.environments or []
         run_all: bool = options.run_all
         checkout_mode: bool = options.checkout
         source_ref: Optional[str] = options.benchmark_source

pybm/util/extras.py

@@ -2,5 +2,5 @@ def get_extras():
     """Extra pybm functionality, specified as a valid argument to
     setuptools.setup's 'extras_require' keyword argument."""
     extra_features = {"gbm": ["git+https://github.com/google/benchmark"]}
-    extra_features["all"] = sum(extra_features.values(), start=[])
+    extra_features["all"] = sum(extra_features.values(), [])
     return extra_features

setup.py

@@ -1,7 +1,9 @@
+from typing import List
+
 from setuptools import setup, find_packages
 
 
-def get_requirements() -> list[str]:
+def get_requirements() -> List[str]:
     with open("requirements.txt", "r") as f:
         return f.readlines()
 
@@ -12,7 +14,7 @@ def get_extras():
     extra_features = {
         "gbm": ["google_benchmark @ git+https://github.com/google/benchmark"]
     }
-    extra_features["all"] = sum(extra_features.values(), start=[])
+    extra_features["all"] = sum(extra_features.values(), [])
     return extra_features