feat(mvn): upgrade to Spring Boot 2.6.7 / Spring 5.3.19
feat(mvn): upgrade to Spring Boot 2.6.7 / Spring 5.3.19

upgraded Spring Boot and all its dependencies

mvocu/perun,mvocu/perun,mvocu/perun,zlamalp/perun,martin-kuba/perun,martin-kuba/perun,zlamalp/perun,martin-kuba/perun,CESNET/perun,martin-kuba/perun,CESNET/perun,mvocu/perun,mvocu/perun,zlamalp/perun,CESNET/perun,martin-kuba/perun,CESNET/perun,mvocu/perun,zlamalp/perun,martin-kuba/perun,zlamalp/perun,CESNET/perun,zlamalp/perun,CESNET/perun,mvocu/perun,CESNET/perun,zlamalp/perun,martin-kuba/perun