v1.2.0

• For video conversion, removed the 'output' option, so it now just uses the same filename. If it's already a webm, then it will prefix with 'converted-'.
• README.md has also been updated to include the commands and options available.

v1.1.0

Made the following changes for image conversion:

• Removed 'output' option, so it now just uses the same filename. If it's already a webp, then it will prefix with 'converted-'.
• Use ImageMagick 'convert' instead of 'mogrify', to make sure the original file is not overwritten

v1.0.0

Basic functionality for image and video conversion complete