Add Node.js v20+ support

[christianvuerings]

Changes

• Support Node.js v18/20/22
• Drop support for Node.js <18 (Node.js dropped support for v16 on Sep 11, 2023)

Related PRs

• Convert CI from Travis.CI to GitHub workflows #16

Notes

We still see the following warning:

• 'IdleNotificationDeadline' is deprecated: Use MemoryPressureNotification(). Once nan releases a fix 'IdleNotificationDeadline' is deprecated: Use MemoryPressureNotification() nodejs/nan#953 we can fix the issue

[ljharb]

I think it’d be ideal to do the CI conversion in a separate PR, at least, to ensure nothings breaking (also the test suite conversion, i think, after the breaking change lands?)

[christianvuerings]

Fixes

../src/memwatch.cc:149:12: warning: enumeration value 'kGCTypeMinorMarkCompact' not handled in switch [-Wswitch]

[jparise]

I think we should also determine whether the case below should also consider kGCTypeMinorMarkCompact (i.e. does the "compaction" accounting behavior apply to both types):

node-memwatch/src/memwatch.cc

Line 168 in 99c84fa

if (type == kGCTypeMarkSweepCompact) {

[christianvuerings]

Looks like v8 / chromium renamed kGCTypeMinorMarkCompact to kGCTypeMinorMarkSweep
chromium/chromium@257c88d#diff-11920fd94088cac09a3e53d31a3a3565501b9692fa7842fd98168536e279e002R174
https://chromium-review.googlesource.com/c/chromium/src/+/4669537

https://wingolog.org/archives/2023/12/07/the-last-5-years-of-v8s-garbage-collector

Originally called minor mark-compact or MinorMC in the commit logs, it was renamed to minor mark-sweep or MinorMS to indicate that it doesn’t actually compact. (V8’s mark-compact old-space doesn’t have to compact: V8 usually chooses to just mark in place. But we call it a mark-compact space because it has that capability.)

Also noticed that we already have this warning in the current version of our package so going to pull this change out for now to not cause any regressions: https://github.com/airbnb/node-memwatch/actions/runs/11726571196/job/32665528031#step:4:166

../src/memwatch.cc:149:11: warning: enumeration value ‘kGCTypeMinorMarkCompact’ not handled in switch [-Wswitch]
  149 |     switch(type) {
      |           ^

[christianvuerings]

I think it’d be ideal to do the CI conversion in a separate PR, at least, to ensure nothings breaking (also the test suite conversion, i think, after the breaking change lands?)

@ljharb Updated this PR to only include the breaking change

See christianvuerings#4 (same branch as this one) which shows that the build + tests now pass in Node.js >=18 (all LTS versions)

[ljharb]

I'm not qualified to review C++ code, but tests are passing and it LGTM! Once another maintainer approves it I'm happy to land it.