title can't contain character "\'"

[Deturium]

The father doc‘s escape work is WTF.
: (

[Deturium]

export default {
  doc: {
    title: "father's doc",   // notice we have a ' here
  },
}

Then you will get crash like this:

ᕙ(⇀‸↼‵‵)ᕗ

---

This problem is happended at umi-plugin-father-doc/src/index.ts#L95

I try to fix this bug by the way but failed.

Both opts.title.replace('\'', '\\'') and escapeHTML(opts.title) can't slove the problem.

---

I'm too tired, so there is no PR but issue leave to you. : )