Fixed extra newline of the generated licenses from Windows OS

The generated licenses contains extra line break for each line in
Windows OS. Adding the `newline='\n'` to fix the issue.

Signed-off-by: Chin Yeung Li <[email protected]>

Author: chinyeungli

src/attributecode/model.py

@@ -1097,7 +1097,7 @@ def dump_lic(self, location, license_dict):
                             license_name, license_context, license_url = license_dict[lic_key]
                             license_info = (lic_key, license_name, license_context, license_url)
                             license_key_name_context_url.append(license_info)
-                            with io.open(license_path, mode='w', encoding='utf-8') as lic:
+                            with io.open(license_path, mode='w', encoding='utf-8', newline='\n') as lic:
                                 lic.write(license_context)
                     except:
                         pass