Bump v3

[thilp]

Bump Transformer’s version to 3.0.0, following #80.

[zincr]

🤖 zincr found 2 problems , 1 warning

❌ Approvals
❌ Specification
ℹ️ Large Commits
✅ Dependency Licensing

Details on how to resolve are provided below

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Approvals

All proposed changes must be reviewed by project maintainers before they can be merged

Not enough people have approved this pull request - please ensure that 1 additional user, who have not contributed to this pull request approve the changes.

• ✅ Approved by PR author @thilp
• ❌ 1 additional approval needed
   

Specification

All pull requests must follow certain rules for content length and form

Please ensure the follow issues are resolved:

• ❌ Pull Request Title must be atleast 8 characters
• ✅ Pull Request body must be atleast 8 characters
• ✅ Pull Request body must contain issue number
   

Large Commits

Checks all commits for large additions to a single file. Large commits should be reviewed more carefully for potential copyright and licensing issues

This file contains a substantial change, please review to determine if the change comes from an external source and if there are any copyright or licensing issues to be aware of

• ℹ️ poetry.lock had +100 lines of code changed in a single commit
  Please review this file to determine the source of this change