Upgrade unix-dgram to support Node 18, and some other small updates (#…

…237)

* Upgrade unix-dgram to support Node 18, and some other small updates

* Remove very out of date Node 8 support to allow mocha to run

* Remove mocha/eslint upgrades and revert back some other changes to try to get this working in more Node versions again

* Remove v18 for now.  Tried multiple versions and works for me locally

.github/workflows/node.js.yml

@@ -15,6 +15,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
+        # TODO: add in 18.x, which works locally but has issues in Actions
         node-version: [8.x, 10.x, 12.x, 14.x, 16.x]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
     runs-on: ${{ matrix.os }}

README.md

@@ -292,7 +292,7 @@ When you've done all this we're happy to try to get this merged in right away.
 
 Versions will attempt to follow semantic versioning, with major changes only coming in major versions.
 
-npm publishing is possible by one person, [bdeitte](https://github.com/bdeitte), who has two-factor authentication enabled for publishes.  Publishes only contain one additional library, unix-dgram.
+npm publishing is possible by one person, [bdeitte](https://github.com/bdeitte), who has two-factor authentication enabled for publishes.  Publishes only contain one additional library, [unix-dgram](https://github.com/bnoordhuis/node-unix-dgram).
 
 ## Name