prefer-switch: missing some cases

[ikatyang]

Bug Report

• TSLint version: 5.2.0
• TypeScript version: 2.3.2
• Running TSLint via: CLI & vscode-tslint

TypeScript code being linted

declare const x: any;

if (x === 1 || x === 2 || x === 3) {}
if (x === 1 || x === 2 || x === -3) {}
if (x === 1 || x === 2 || x === null) {}
if (x === 1 || x === 2 || x === true) {}
if (x === 1 || x === 2 || x === false) {}
if (x === 1 || x === 2 || x === `123`) {}

with tslint.json configuration:

{
    "rules": {
        "prefer-switch": [true]
    }
}

Actual behavior

if (x === 1 || x === 2 || x === 3) {} // error message
if (x === 1 || x === 2 || x === -3) {} // no error message
if (x === 1 || x === 2 || x === null) {} // no error message
if (x === 1 || x === 2 || x === true) {} // no error message
if (x === 1 || x === 2 || x === false) {} // no error message
if (x === 1 || x === 2 || x === `123`) {} // no error message

Expected behavior

if (x === 1 || x === 2 || x === 3) {} // error message
if (x === 1 || x === 2 || x === -3) {} // error message
if (x === 1 || x === 2 || x === null) {} // error message
if (x === 1 || x === 2 || x === true) {} // error message
if (x === 1 || x === 2 || x === false) {} // error message
if (x === 1 || x === 2 || x === `123`) {} // error message