prefer-to-have-length does not take `toStrictEqual` into account

The [prefer-to-length-rule](https://github.com/jest-community/eslint-plugin-jest/blob/master/docs/rules/prefer-to-have-length.md) only warns on `toBe(n)` calls, but not on `toStrictEqual(n)`. Which is pretty much the same.

Can we get support for this?