Get all types endpoint has some incorrect entries

[WPaul15]

The /types endpoint is returning various bad entries. Here's what I get if I call that endpoint:

{
  "types": [
    "Artifact",
    "Conspiracy",
    "Creature",
    "Dragon",
    "Elemental",
    "Enchantment",
    "Goblin",
    "Hero",
    "instant",
    "Instant",
    "Jaguar",
    "Knights",
    "Land",
    "Phenomenon",
    "Plane",
    "Planeswalker",
    "Scheme",
    "Sorcery",
    "Specter",
    "Summon",
    "Tribal",
    "Vanguard",
    "Wolf",
    "You’ll"
  ]
}

Gatherer has the following types in the advanced search dropdown:

• Artifact
• Basic
• Conspiracy
• Creature
• Dungeon
• Eaturecray
• Enchantment
• Ever
• Host
• Instant
• Land
• Legendary
• Ongoing
• Phenomenon
• Plane
• Planeswalker
• Scariest
• Scheme
• See
• Sorcery
• Summon
• Tribal
• Vanguard
• World
• You'll

I realize that some from this list—like "Basic" and "Legendary"—are in the /supertypes endpoint, but there are defintely some that shouldn't be in there, like "Dragon", "instant", "Jaguar", etc.