[shellcheck] use `{ …; }` instead of `(…)` to group test commands
[shellcheck] use `{ …; }` instead of `(…)` to group test commands

ljharb/nvm,PeterDaveHelloKitchen/nvm,PeterDaveHello/nvm,evocateur/nvm,edwmurph/nvm,edwmurph/nvm,ljharb/nvm,creationix/nvm,PeterDaveHelloKitchen/nvm,creationix/nvm,PeterDaveHello/nvm,evocateur/nvm