FastlaneはGemがいい？

there is no web session to update · Issue #15534 · fastlane/fastlane · GitHub

Uninstall fastlane

brew cask uninstall fastlane

Install fastlane by gem

sudo gem install fastlane -NV

Add this lines in ~/.bash_profile

export FASTLANE_PATH="/usr/local/lib/ruby/gems/2.6.0/gems/fastlane-2.134.0/bin"
export PATH="$FASTLANE_PATH:$PATH"
source ~/.bash_profile

でも僕はfish

And now I have the latest version 🎉