v0.5.1

• Add support for timeUnitShouldShowVariation
• Add cql.shorthand.vlSpec
• Add shorthand support for filterInvalid
• Add support for legend properties (#222)
• Add excludeInvalid flag to schema.cardinality() (#224)

Fixes

• Return a spec with no bin if the bin=false
• Fix default enum values for scale.type
• Do not infer ordinal or nominal type if distinct is above a limit