Support for Versioned Secrets (KV V2 secret engine support) (adobe#37)

* Versioned Secrets
√ destroy operation
√ "move" operation
√ numbers and arrays get cast as strings and objects!!
√ show icon or error when secret data is null
√ default new secret path seems to be broken now with multiple folder-structures
√ clear TOKEN as username
√ swap raw and hide values for icons
√ make Hide Values persistent
√ improve error output for move requests

* - Add support for wildcard policies on v2 secret backends
- Update to Electron 4.0
- Update copyright

Fixed bugs in displaying secrets (adobe#36)

- Fixed: object sub-properites modified in JSON did not propogate to UI
- Fixed: Values of type Number were cast as Strings on edit
- Fixed: Arrays were improperly cast as Object on edits
- Added: Stricter type checking
- Added: Support for non-key-value values in Arrays
- Added: Support for Numbers and Arrays

Remove duplicate secrets

Release v0.1.6

Release v0.1.5

Release v0.1.4

Release v0.1.3

Release v0.1.2

Release v0.1.1

Release 0.1.0