lib: enhance use of WeakMap with primordials

Hello, Now, I have added WeakMap in the primordials eslint so have created a line in "/lib/.eslintrc.yaml".

rules:
  no-restricted-globals:
  - name: WeakMap 
        message: "Use `const { WeakMap } = primordials;` instead of the global."

And just import WeakMap in one file actually like that :).

const {
  // [...]
  WeakMap,
} = primordials;

Thanks to allow me to create some PR btw 😄 I hope this will be helpful for you