Update Changelog.md (#35)

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Changelog.md

-## Version 0.9.0 16-06-2021
-* First Version supporting /validate/check and /validate/triggerchallenge endpoints
+### v1.0.0 27-01-2023
+* Added a possibility to enroll a new token via challenge (#23)
+* Implementation of the preferred client mode (#20)
+
+### v0.9.3 24-01-2022
+
+* Supporting following tokens: OTP, Push, WebAuthn, U2F
+* Token enrollment in the application
+* Multiple WebAuthn
+
+### v0.9.0 16-06-2021
+* First Version supporting /validate/check and /validate/triggerchallenge endpoints
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