[no-shadow] False positive for enum

[mshustov]

Repro

I created a repo to reproduce the problem https://github.com/restrry/typescript-eslint-scope-bug

{
  "rules": {
    "@typescript-eslint/no-shadow": "error"
  }
}

enum Direction {
    left = 'left',
    right = 'right',
}

Expected Result
No errors reported.

Actual Result
1:6 error 'Direction' is already declared in the upper scope @typescript-eslint/no-shadow

Versions

package	version
@typescript-eslint/eslint-plugin	4.0.0-alpha.5
@typescript-eslint/parser	4.0.0-alpha.5
TypeScript	3.9.5
ESLint	6.8.0
node	10.21.0
npm	N/A
yarn	1.21.1