v.1.1.0

1. Added the ability to change the spinner
2. Added built-in spinners and fillers
3. Expanded the number of built-in colors
4. Significantly optimized the function for generating the progress bar string: takes up ~25% fewer bytes than before.
5. The speed of the render() function has been increased by ~3-4 times.
6. Added tests.
7. The Update(i) function now returns 2 parameters: (string, error)

v.1.0.0

Full Changelog: https://github.com/MothScientist/goProgressBar/commits/v.1.0.0