Feature
* feat: added PNG support to add_frame based on peer review feedback ([`52dd42e`](https://github.com/UBC-MDS/image_modifier/commit/52dd42e0c891c6a2c57d71dd397f591fbd99e2a1))
Unknown
* Merge pull request 68 from UBC-MDS/add_frame_png
Add frame png ([`17b016e`](https://github.com/UBC-MDS/image_modifier/commit/17b016e8d66514cb4d851848992f79d7d6a08907))
* saved example notebook under environment ([`2731a38`](https://github.com/UBC-MDS/image_modifier/commit/2731a38637d56e585cd76610e7032c6c63edefbb))
* removed unnecessary outputs ([`32a0959`](https://github.com/UBC-MDS/image_modifier/commit/32a09593b0f172b5d22a6b8210e8ae7eca97cdc8))
* added rainbow demostration with add_frame ([`7c54f69`](https://github.com/UBC-MDS/image_modifier/commit/7c54f69d12440229f88c43b23668f3bfcfc48407))
* updated add_frame function to support PNG ([`039c9bf`](https://github.com/UBC-MDS/image_modifier/commit/039c9bfd4b028c936b6d8968d2a82515c658fcbe))
* updated test script for add_frame ([`7f01cdd`](https://github.com/UBC-MDS/image_modifier/commit/7f01cddaa123fcef5bda00dd2160a24b5ec6d287))