[type-annotation-spacing] fails in object types under different conditions

[zuzusik]

rule config:

"typescript/type-annotation-spacing": ["error", {"before": true, "after": true}]

code:

class Some {
  // fails on every `:` inside object typing (expected)
  a : {some: string, other: {more: number}}; 

  // doesn't fail (not expected)
  someMethod : (args : {some: string, other: {more: number}}) => void; 

  // doesn't fail (not expected)
  doSomething(args : {some: string, other: {more: number}}) : void {}
}

// doesn't fail (not expected)
function some(args : {some: string, other: {more: number}}) : void {} 

// doesn't fail (not expected)
const a : {some: string, other: {more: number}} = {some: '1', other: {more: 2}};

[bradzacher]

This is a problem with how eslint traverses the tree that typescript-eslint-parser provides: eslint/typescript-eslint-parser#532 (comment)