test: add semicolons for linter update

Add missing semicolons that will be flagged when we update
@babel/eslint-parser to 7.16.0.

PR-URL: https://github.com/nodejs/node/pull/40720


Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>