Incompatible with php7.4

[eltitano]

Hi,

i wanted to try wp-react-starter as a new way to speed up my plugin development but unfortunately its incompatible wit php 7.4 and upwards. It seems its only because of the metasyntactical/composer-plugin-license-check locked at version 0.5.0. Thats why i prefer to lock my dependencies only downwards and run my testsuit to ensure upgraded packages dont break anything ;)