Print platform information in microbenchmark output.

Author: scoder

benchmark/microbench.py

@@ -365,4 +365,7 @@ def main(*benchmarks):
     except AttributeError:
         pass
 
+    import platform
+    print(f"Running benchmarks with Python {platform.python_version()} on {platform.platform()}")
+
     main(*sys.argv[1:])