Don't forget to remove picocli workaround when 4.7.2 comes out

[jiridanek]

• fallbackValue NULL_VALUE does not work for Collection options (was: How do I get picocli to parse "--item --item foo" as [null, "foo"] :List<String>) remkop/picocli#1993

[jiridanek]

Can't do it yet,

• ParameterException: NullPointerException: null while processing argument at or before arg[0] (was: commandLine.parseArgs("--item="); and commandLine.parseArgs("--item", ""); should behave identically, but current; they don't) remkop/picocli#1998