inline methods of jsx-ast-utils to simplify dependency tree

[ulrichstark]

This is my attempt to simplify the dependency tree when using eslint-plugin-solid.
eslint-plugin-solid uses three methods from jsx-ast-utils: propName, getProp and hasProp.
The dependency tree of jsx-ast-utils is bloated as you can see in the changes in pnpm-lock.yaml, because it depends on all kinds of other packages to be backwards compatible with Node 4 and has no plan to change this (jsx-eslint/jsx-ast-utils#114).
Removing jsx-ast-utils as dependency by inlining used methods would save users from installing up to 50 packages.

All tests are green and I'm open for discussion/further work on this change.

Fixes #115

[joshwilsonvu]

This is fantastic! I appreciate the help with node_modules bloat, wouldn't have thought this package's deps would be so heavy.

The only thing I'm concerned about is losing jsx-ast-utils's checks for props on object literals spread in, like <div {...{ foo: 'bar' }} >. But looking at their implementation, it doesn't look too hard to add. I'm going to push that change to your branch, and then this should be good to go!

[ulrichstark]

Awesome! I'm glad I could help. Thanks for your work and happy New Year 🎉