[bugfix] skipping validation for OrderedDict

[YongHeeK]

using JSONSchema
using OrderedCollections

schema = Schema("""{
    "\$schema": "http://json-schema.org/draft-07/schema",
    "\$id": "test.json",
    "type": "object",
    "title": "test",
    "required": [
        "Key"
    ],
    "additionalProperties": true,
    "properties": {
        "Key": {
            "type": "string",
            "enum": ["A", "B"] 
        }
    }
}""")

data = OrderedDict("Key" => "A")
validate(data, schema) 

# validation should fail on this
data2 = OrderedDict("Key" => 100)
validate(data2, schema) 

I forgot to change type signature on validation.jl .

[YongHeeK]

@odow would you mind merge and release this fix?

[odow]

Yes, sorry. I have been moving countries (and continents) over the last two weeks 😄

[YongHeeK]

Wow that must been hard in thesedays 😲
Thanks you