zlib: revert back to Functions · nodejs/node@6aeb555

zlib: revert back to Functions

Using ES6 Classes broke userland code. Revert back to functions. PR-URL: #13374 Fixes: #13358 Ref: #13370 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Refael Ackermann <refack@gmail.com> Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

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