0.0.4

fix: ignore errors when decoding message headers

Added a flag for iconv_mime_decode_headers method to ignore
malformed headers.
As stated by php documentation:
```
There are a lot of broken mail user agents that don't
follow the specification and don't produce correct MIME headers.
```

(cherry picked from commit 542ca8cbe0b88921fec702bccc19fa94712f885d)