update the readme

update the badge url

change the list-all function after feedback from original pr

tidy up the code

try again with the install asdf + kubectl

try again with the install asdf + kubectl

try again with the install asdf + kubectl

try again with the install asdf + kubectl

try again with the install asdf + kubectl

remove travis build file ... not used

requires the kubectl plugin

update the actions

update the actions

update the readme title

install kubectl