Update version for the next release (v0.15.0)

[brunoocasali]

⚠️ Breaking changes

• Refactorise the errors, now error_code and error_type has types instead of string (Refactorise the errors #234) @irevoire
• Put type on timestamp and duration (Put type on timestamp and duration #237) @irevoire
  • The time crate will be needed if you need to manipulate API keys (check for more info Use chrono #226, Put type on timestamp and duration #237 (comment), and Add updateAt and createdAt in the index class integration-guides#121 (comment)).

🚀 Enhancements

• Refactorise the settings (Refactorise the settings #235) @irevoire

Thanks again to @irevoire! 🎉

[brunoocasali]

@irevoire and @curquiza I put in the description of this PR all the information I'll add into the release, can you please review that too? (This is my first release of rust-sdk and I want to make the changes clearer for the users :))

[irevoire]

Yeah I think it’s great.
Don’t you want to add the custom user-agent in this release also?

[brunoocasali]

Yeah I think it’s great. Don’t you want to add the custom user-agent in this release also?

Unfortunately, I didn't have the time to work on this feature yet :/ (we're focused on the v0.26 now, I'm just releasing some SDK's that I had on my waiting list 😅)

[curquiza]

I approve the PR and the release changelog 👍

[irevoire]

Ok no problem I think we can merge and release then 👍

[brunoocasali]

bors merge

[bors]

Build succeeded:

• clippy-check
• integration-tests
• readme-check
• wasm-build