com.snowplowanalytics.self-desc can't be validated with igluctl

[estahn]

FAILURE: Schema [/home/circleci/project/schemas/com.snowplowanalytics.self-desc/instance-iglu-only/jsonschema/1-0-0] contains following errors: 
warning: the following keywords are unknown and will be ignored: [self]
    level: "warning"
    schema: {"loadingURI":"#","pointer":""}
    domain: "syntax"
    ignored: ["self"]

FAILURE: Schema [/home/circleci/project/schemas/com.snowplowanalytics.self-desc/schema/jsonschema/1-0-0] contains following errors: 
warning: the following keywords are unknown and will be ignored: [self]
    level: "warning"
    schema: {"loadingURI":"#","pointer":""}
    domain: "syntax"
    ignored: ["self"]

FAILURE: Schema [/home/circleci/project/schemas/com.snowplowanalytics.self-desc/instance/jsonschema/1-0-0] contains following errors: 
warning: the following keywords are unknown and will be ignored: [self]
    level: "warning"
    schema: {"loadingURI":"#","pointer":""}
    domain: "syntax"
    ignored: ["self"]