Adjusted dynamic library extension for Windows (which is also .lib).

SConscript

@@ -255,11 +255,7 @@ def _lib_filename(env: Environment, name: str, type: str = 'static') -> str:
         }[type]
         return f'lib{name}.{ext}'
     elif os.name == 'nt':
-        ext = {
+        return f'{name}.lib'
-            'static': 'lib',
-            'shared': 'dll'
-        }[type]
-        return f'{name}.{ext}'
     else:
         raise Exception('What OS is this?')