v1.12.0

• Fix coercions of Array[File] and Array[Directory] to Array[String] (#669 @john-smith, #681 @markjschreiber)
• Ensure presence of optional fields in structs read from runner input JSON file (#686 @adthrasher)
• miniwdl run: accept CLI inputs of compound types (pairs, maps, structs) as single-quoted JSON; also accept Array[Directory]
• miniwdl check: warn when a document of an older WDL version imports a document of a newer WDL version
• Dependency updates