Upgrade espree to 4.0.0

[mysticatea]

This upgrade is:

• support ecmaVersion: 2019.
• remove supporting ecmaFeatures.experimentalObjectRestSpread option.
• change AST about JSX; Literal → JSXText.
• support JSXFragment.

But..., This parser should use ESLint's espree to support both ESLint 5.x and 4.x.

[mysticatea]

I published v3.0.0.