deps: increase "engines" to "node" : ">= 10.12.0"
deps: increase "engines" to "node" : ">= 10.12.0"

Makes npm warn users if they are using an unsupported Node version.

Refs: https://github.com/nodejs/node-gyp/pull/2123
PR-URL: https://github.com/nodejs/node-gyp/pull/2153
Reviewed-By: Jiawen Geng <8f5a7089e1809fdab8e8d97ec73a77a8b0770d74@gmail.com>
Reviewed-By: Rod Vagg <f9f03903429036ef609ed7ca822fddfa76155c29@vagg.org>

nodejs/node-gyp,nodejs/node-gyp,nodegit/node-gyp,nodejs/node-gyp,nodegit/node-gyp,nodegit/node-gyp,nodejs/node-gyp,nodegit/node-gyp,nodegit/node-gyp,nodejs/node-gyp