Set output to UTF8 on windows (on Python >= 3.7)

cibuildwheel/__main__.py

@@ -54,6 +54,11 @@ def strtobool(val: str) -> bool:
 
 
 def main() -> None:
+    if sys.platform == 'win32' and hasattr(sys.stdout, 'reconfigure'):
+        # the encoding on Windows can be a 1-byte charmap, but all CIs support
+        # utf8, so we hardcode that
+        sys.stdout.reconfigure(encoding='utf8')
+
     parser = argparse.ArgumentParser(
         description='Build wheels for all the platforms.',
         epilog='''