Bump version to 0.3.0

[notmandatory]

Description

Bump version to 0.3.0

Notes to the reviewers

Checklists

All Submissions:

• I've signed all my commits
• I followed the contribution guidelines
• I ran cargo fmt and cargo clippy before committing
• I've updated CHANGELOG.md

[codecov-commenter]

Codecov Report

Merging #49 (9055609) into master (32a3a55) will not change coverage.
The diff coverage is n/a.

❗ Current head 9055609 differs from pull request most recent head daf0f92. Consider uploading reports for the commit daf0f92 to get more accurate results

@@           Coverage Diff           @@
##           master      #49   +/-   ##
=======================================
  Coverage   40.50%   40.50%           
=======================================
  Files           2        2           
  Lines         279      279           
=======================================
  Hits          113      113           
  Misses        166      166           

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[rajarshimaitra]

tACK