Bug fix

• Removed hacks for outdated browsers (#783).

Engine.IO 6.5.1

• The Engine.IO client-side library has been updated to version 6.5.1 (81e095e).

Engine.IO 6.2.3

• The Engine.IO client-side library has been updated to version 6.2.3 (06190dd).

Engine.IO 6.2.1 - SockJS 1.6.0

• The Engine.IO client-side library has been updated to version 6.2.1 (42369fe).
• The SockJS client-side library has been updated to version 1.6.0 (72624b2).

WS 8.0.0

• Fixed compatibility with ws@8 (3ee5abe).

Engine.IO 5.1.2

• The Engine.IO client-side library has been updated to version 5.1.2 (57c3bdb).

Engine.IO 5.1.1

• The Engine.IO client-side library has been updated to version 5.1.1 (0d83c88).

Engine.IO 5.0.0

• The Engine.IO client-side library has been updated to version 5.0.0 (a7ba724).

Bug fix

• Added a workaround for a SockJS bug that could make the server crash
  (#767).

Engine.IO 4.0.1 - SockJS 1.5.0

• The Engine.IO client-side library has been updated to version 4.0.1 (c8892de).
• The SockJS client-side library has been updated to version 1.5.0 (6b44197).