v0.5.4

JET v0.5.4

Diff since v0.5.3

Closed issues:

• "is not defined" assign type parameter with Base.@kwdef (#305)
• for 1 of 2 union split cases, no matching method found for call signatures (#306)
• false negative converting in parameterized function (#307)

Merged pull requests:

• update to JuliaInterpreter@0.9 (#296) (@aviatesk)