refactor: Cleaned up all code, hopefully fixed all filters

[kyranet]

To install:

• npm i kyranet/canvasConstructor#refactor/cleaned-up-all-code
• yarn add kyranet/canvasConstructor#refactor/cleaned-up-all-code

Fixes #341

[NTMNathan]

Alright, I just did a NPM install of the refractor and tested this patch. To confirm, the filters you said in my issue post are working except convolute. For darkness, to achieve the darkness, the value has to be negative number, for example: .process(darkness, -140).

blur, darkness, sharpen, convolute are having issues, they keep giving me the TypeError: ImageData expected error hence you said that fixing convolute should have fixed the blur and sharpen. It didn't for me...