chore: bump node to v12.8.1 (7-0-x) (#19835)

* chore: bump node in DEPS to v12.8.1

* test: disable parallel/test-http2-reset-flood

Disabled new Worker test owing to a threading issue where the Worker
segfaults on worker.on('message', () => {}). We've disabled failing
worker tests previously as we don't offer first-class support for them
in Electron.

DEPS

@@ -12,7 +12,7 @@ vars = {
   'chromium_version':
     '78.0.3866.0',
   'node_version':
-    'v12.8.0',
+    'v12.8.1',
   'nan_version':
     '2ee313aaca52e2b478965ac50eb5082520380d1b',
 

script/node-disabled-tests.json

@@ -7,6 +7,7 @@
   "parallel/test-inspector-workers-flat-list",
   "parallel/test-sync-io-option",
   "parallel/test-heapdump-async-hooks-init-promise",
+  "parallel/test-http2-reset-flood",
   "parallel/test-bootstrap-modules",
   "parallel/test-buffer-backing-arraybuffer",
   "parallel/test-buffer-constructor-node-modules-paths",