Bump braintree-java from 3.18.0 to 3.21.0#30

dependabot[bot] wants to merge 1 commit intowork-for-release-0.23.xkillbill/killbill-braintree:work-for-release-0.23.xfrom

dependabot/maven/work-for-release-0.23.x/com.braintreepayments.gateway-braintree-java-3.21.0killbill/killbill-braintree:dependabot/maven/work-for-release-0.23.x/com.braintreepayments.gateway-braintree-java-3.21.0Copy head branch name to clipboard