Support node v18 and drop node v12

support parsing charset

Block __proto__ name

Explicitly handle __proto__

Only node 12

Backport #21, #22

Change module namespace

Remove engines

Throw on .type() if header is completely missing

Skip processing parameters when content type is not multipart

Throw directly from header processing

Update deps

Update deps

Throw errors

Backport #21, #22

Commercial version of v3 branch