rule keep-options-order

[igorkamyshev]

fixes #61

• suggestion test-cases
• rule implementation
• suggestion implementation
• imports
• docs

[igorkamyshev]

@sergeysova I remember, you've asked to add autofix to this rule. But personally, I'm little afraid of autofix because ESLint doesn't have any API for AST to source code transformation, so I do it manually and can break something in uncommon environments (e.g., FlowJS).

Should we replace suggestion by autofix? What do you think?

[igorkamyshev]

So, I'm going to merge it, but we can still add autofix in separate PR.