[member-naming] Avoid for 'constructor' of class

[tetsuharuohzeki]

Repro

{
  "rules": {
        "@typescript-eslint/member-naming": ["warn", {
            "private": "^_",
            "protected": "^_",
        }],
  }
}

class A {
   private constructor() {}
}

class B {
   protected constructor() {}
}

Expected Result

@typescript-eslint/member-naming should avoid the warn/error if the method is constructor.

Actual Result

warning  private property constructor should match /^_/  @typescript-eslint/member-naming
warning   property constructor should match /^_/  @typescript-eslint/member-naming

Additional Info

Versions

package	version
@typescript-eslint/eslint-plugin	1.4.2
@typescript-eslint/parser	1.4.2
TypeScript	3.3.3333
ESLint	5.15.2
node	11.6.0
npm	X.Y.Z

[gavinbarron]

I'll take a look at this one