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**New features**
- Prevent ``attachment`` attributes to be modified manually (fixes 83)
**Bug fixes**
- Fix crash when the file is not uploaded using ``attachment`` field name (fixes 57)
- Fix crash when the multipart content-type is invalid.
- Prevent crash when filename is not provided (fixes 81)
- Update the call to the Record resource to use named attributes. (97)
- Show detailed error when data is not posted with multipart content-type.
- Fix crash when submitted data is not valid JSON (fixes 104)
**Internal changes**
- Remove hard-coded CORS setup (fixes 59)