leave inline disposition as inline

[m42e]

Content disposition of inline is changed. I could not figure out any reason to overwrite inline disposition with attachment.
It is causing issues in AnonAddy, when the message is forwarded as it destroys the references in the mail body.

[codecov-commenter]

Codecov Report

Base: 97.03% // Head: 97.00% // Decreases project coverage by -0.03% ⚠️

Coverage data is based on head (f970f23) compared to base (65c7e61).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #409      +/-   ##
============================================
- Coverage     97.03%   97.00%   -0.04%     
- Complexity      176      177       +1     
============================================
  Files             6        6              
  Lines           439      468      +29     
============================================
+ Hits            426      454      +28     
- Misses           13       14       +1     

Impacted Files	Coverage Δ
src/Parser.php	95.75% <100.00%> (-0.03%)	⬇️
src/Charset.php	100.00% <0.00%> (ø)
src/Attachment.php	100.00% <0.00%> (ø)

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[willbrowningme]

Hi @eXorus, would it be possible to create a new minor release that includes this PR?

Many thanks,
Will

[eXorus]

Hello @willbrowningme

I apologize, I completely forgot to make the release. Thank you for the reminder. I'm a bit overwhelmed at the moment, so I haven't been able to dedicate as much time as I would like to php-mime-mail-parser.

Released in 8.0.1.

[willbrowningme]

Thanks very much!