test: clean up dgram-broadcast-multi-process test
Checklist
-
make -j8 test
(UNIX), orvcbuild test nosign
(Windows) passes -
tests and/or benchmarks are included -
commit message follows commit guidelines
Affected core subsystem(s)
test
Description of change
Use assert.strictEqual() instead of assert.equal(), === instead of ==, and const instead of var.