Work around apparent SSL incompatibility with Node 18

[chuckdries]

When attempting to install under node 18 I encounter this error message,

/Users/chuckdries/.node-gyp/18.0.0/include/node/openssl/macros.h:155:4: error: "OPENSSL_API_COMPAT expresses an impossible API compatibility level"
#  error "OPENSSL_API_COMPAT expresses an impossible API compatibility level"
   ^
1 error generated.

so I applied the solution from this stackoverflow and it worked. Probably doesn't help on Windows, I didn't try. ¯\_( ツ )_/¯ https://stackoverflow.com/questions/70541687/linking-local-openssl-to-nodejs-c-addon

[ianhattendorf]

Hmm, probably related to the move to OpenSSL 3. I'm worried this will break for older node versions, let's see what happens in CI.

[ianhattendorf]

@chuckdries looks like CI passed, do you want to try adding 18 to jobs.(linux,macos)-tests.strategy.matrix.node inside .github/workflows/tests.yml so we can see if we pass there?

And go ahead and remove 12, that's EOL as of ~4 months ago.