Maven Release 5.2.1

299 async api string with format date or datetime (#305)

* 299-adding data and date-time with format

* 299-update versions

* 299 - adding format properties and format annotation at arrays

* 299 - fix intend

* 299 - format. remove leading space

* 299 - reduce parameter

* recheck spaces

* 299 - change documentation

* 299 - simplify functions

* remove unused imports

* 299 - date type configurable, change version

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Co-authored-by: nbis Klaus Bertram <dev@n-bis-de>