chore: bump version to 5.2.1 and update changelog with subtitle overl…

…ay fix

Merge pull request #103 from imagekit-developer/new-transformation-an…

…d-upload-changes

New transformation and upload changes

chore: update version from 5.1.0-beta.1 to 5.1.0 in package.json and …

…package-lock.json

feat: move getResponsiveImageAttributes and related types to responsi…

…ve module

fix: remove gzip and brotli size badges from README.md

fix: replace formData.append with formData.set for upload options

fix: update version to 5.0.0-beta.6 in package.json and package-lock.…

…json

fix: update version to 5.0.0-beta.5 in package.json and package-lock.…

…json, fix types location

fix: update version to 5.0.0-beta.4 in package.json and package-lock.…

…json

fix: update version to 5.0.0-beta.3 and enhance npm publish workflow