[dist] 2.4.11
[deps] Bump dependencies
[minor] Compile a new Engine.IO library (1.4.3)
[dist] 2.4.12
[minor] Free the `ultron` reference
[fix] Fix a race condition for the `spark.end` method
[example] Suppress some deprecation warnings in the middleware example
[example] Suppress a deprecation warning in the authorization example
[test] Enable the basic auth test for more transformers
[fix] Write the buffered messages before emitting the `open` event
Update README.md

minor typo
Merge pull request #317 from JimiHFord/patch-1

Update README.md
[fix] Disable permessage deflate - it's unstable
[doc] Added SECURITY.md
[doc] Remove his infavor of their
[doc] Adding a contributing document
[doc] Minor URL fixes and the addition of code fencing
[doc] Fix typos and rephrase some sentences
Treat protocol-level pings as valid pings with `ws` transport.
Merge pull request #323 from STRML/master

Treat protocol-level pings as valid pings with `ws` transport.