Free memory allocated for typed arrays

[minggangw]

This patch fixed the memory leak when using typed arrays on nodejs > 10

Fix: #842

[wayneparrott]

@minggangw bummer that dtslint is failing the test suite because of transposed union types, e.g.,

Error: /home/runner/work/rclnodejs/rclnodejs/test/types/main.ts:319:1
ERROR: 319:1  expect  TypeScript@4.7 expected type to be:
  Duration | Time
got:
  Time | Duration
ERROR: 322:1  expect  TypeScript@4.7 expected type to be:
  Duration | Time
got:
  Time | Duration

We saw this a while back.
I'll give it a look asap.

[wayneparrott]

See PRs #847 and #848 which combined should fix the linux workflow failures.