feat(webpack): user can enableSVGO

[the-simian]

This commit adds the enableSVGO function that re-enables the full power of the SVGR transformation pipeline that was disabled in create-react app

• adds the enableSVGO function in the webpack.js file
• adds the appropriate contributor (Jesse Harlin, the-simian)
• adds documentation in the api.md
• runs existing prettier enforcement on the affected files

[the-simian]

hey @arackaf can you give this a review? I added quite a bit of info in the api.md for the sake of clarity and examples because this is a sort of 'hard to find' feature I think for a lot of people. If its too much I can pull back

[the-simian]

this PR references issue #272, and completed the feature request

[the-simian]

@with-heart are you the one currently handling commits atm? Would you give this a review?

[arackaf]

@the-simian I haven't touched this code in literally years - if you think the code is good that's enough for me. Other maintainers have also moved on - so go for it.

[SongJuXin]

How to use the enableSVGO feature.