disallowQuotedKeysInObjects: fix Types and Values documentation

[dharkness]

• Added Object to the list of Types
  Should String be removed since it's deprecated?
• Fixed Values list formatting
  Was creating an extra indentation level

[dharkness]

1. Should I remove deprecated types? (String in this case)
2. Which style of listing three or more types do you prefer?
   • Boolean, String or Object (commas)
   • Boolean or String or Object (multiple "or"s)
3. Any preference for ordering the types?
   • match the values list
   • alphabetical
   • some other strict ordering

[dharkness]

From chat with @markelog

1. No, leave deprecated types in the list
2. Use the comma option (first)

[hzoo]

Thanks!