Update Changelog.rst

Merge pull request #193 from 7yl4r/master

+ dataset keyword search implementation, test, & version bump.

+ v1.5.0 changes

Release v1.4.1

Merge pull request #130 from ayushanand18/changelog-update1.4.0

updates changelog with changes by #127, bump to v1.4.0

Merge pull request #123 from ayushanand18/changelog-update

updates changelog to v1.3.1

Merge pull request #118 from ocefpaf/fixes_116

Publish docs only for releases and update GHA

Merge pull request #86 from ayushanand18/occ-update

Occurrences.search function update to bring in consistency in response

version bump & author update

Merge pull request #79 from ayushanand18/docs-update

[update] Docs Update after feature upgrade + changelog update