Support introspection of deprecated input values

[CodingContraption]

Is your feature request related to a problem? Please describe.
When making introspection requests trough graphql-protect, and including for example the isDeprecated field on __InputValue, or the includeDeprecated argument on an args field, graphql-protect will throw an error. This is an example of an introspection response of graphql-protect in front of an apollo router API:

{
  "data": null,
  "errors": [
    {
      "message": "Cannot query field \"isDeprecated\" on type \"__InputValue\".",
      "locations": [
        {
          "line": 64,
          "column": 3
        }
      ]
    },
    {
      "message": "Cannot query field \"deprecationReason\" on type \"__InputValue\".",
      "locations": [
        {
          "line": 65,
          "column": 3
        }
      ]
    },
    {
      "message": "Unknown argument \"includeDeprecated\" on field \"__Field.args\".",
      "locations": [
        {
          "line": 32,
          "column": 5
        }
      ]
    },
    {
      "message": "Unknown argument \"includeDeprecated\" on field \"__Type.inputFields\".",
      "locations": [
        {
          "line": 41,
          "column": 3
        }
      ]
    },
    {
      "message": "Unknown argument \"includeDeprecated\" on field \"__Directive.args\".",
      "locations": [
        {
          "line": 19,
          "column": 7
        }
      ]
    },
    {
      "message": "Cannot query field \"isDeprecated\" on type \"__InputValue\".",
      "locations": [
        {
          "line": 64,
          "column": 3
        }
      ]
    },
    {
      "message": "Cannot query field \"deprecationReason\" on type \"__InputValue\".",
      "locations": [
        {
          "line": 65,
          "column": 3
        }
      ]
    },
    {
      "message": "Unknown argument \"includeDeprecated\" on field \"__Field.args\".",
      "locations": [
        {
          "line": 32,
          "column": 5
        }
      ]
    },
    {
      "message": "Unknown argument \"includeDeprecated\" on field \"__Type.inputFields\".",
      "locations": [
        {
          "line": 41,
          "column": 3
        }
      ]
    },
    {
      "message": "Cannot query field \"isDeprecated\" on type \"__InputValue\".",
      "locations": [
        {
          "line": 64,
          "column": 3
        }
      ]
    },
    {
      "message": "Cannot query field \"deprecationReason\" on type \"__InputValue\".",
      "locations": [
        {
          "line": 65,
          "column": 3
        }
      ]
    }
  ]
}

Describe the solution you'd like
I deduced that this was caused due to missing support in the gqlparser library for these fields, as it was missing recent graphql spec compatibility. In a recent PR this has been fixed, and since 2.5.22 support for introspection of deprecated input values should be present.

So a simple update of the dependency should fix this. I would also like to see a note in the readme to educate users about the graphql spec compatibility.

Describe alternatives you've considered

Additional context

[ldebruijn]

@CodingContraption can this issue be closed now that #173 is merged?

[CodingContraption]

Yes it can, can confirm the newly released version fixed this problem!