[no-unused-vars] false positive when imported type used inside a function with parameter with the same name

[ShPelles]

Repro

{
    "rules": {
        "no-unused-vars": "off",
        "@typescript-eslint/no-unused-vars": ["error"]
    }
}

import { myType } from './myModule';

function fn(myType: myType) {
    const myVar: myType = 1234;
}

Expected Result
No linting issue is raised

Actual Result
Linter raises an error: 'myType' is defined but never used. eslint(@typescript-eslint/no-unused-vars) [1, 10]

Additional Info

Versions

package	version
@typescript-eslint/eslint-plugin	2.28.1-alpha.0
@typescript-eslint/parser	2.28.0
TypeScript	3.8.3
ESLint	6.8.0
node	10.15.3
npm	6.4.1

[bradzacher]

See #1856

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