[Rule] Property type has changed about openapi-diff

[vishrutshah]

Example:

{
  "id": "1026",
  "message": "The new version has a different type 'integer' than the previous one 'string'.",
  "jsonref": "#/paths/~1api~1Parameters/post/registry/properties/b",
  "json-path": "#/paths/api/Parameters/post/registry/properties/b",
  "type": "Error"
}

[vishrutshah]

Added/Verified Rule, Test & Doc