Merge pull request arun11299#80 from licentia-eu/master

Upgrade nlohmann json library to 3.9.1 to fix build issues with gcc 10

explicit constructor initialization for EMap

Merge pull request arun11299#59 from gocarlos/master

build: improve cmake scripts

compile error with master arun11299#37

Why does the existence of a signature algorithm entail a required ver…

…ification? arun11299#24

Update readme

Fix the JWT logo arun11299#8

Updated readme