Fix denial of service security violation

[wouterbeek]

Projects that use the latest version of ink as a dependency are currently flagged for this security violation. The violation is already fixed downstream in dependency ws, but requires ink to upgrade from ^7.2.5 to ^7.4.6.

PS: yarn audit is know to be unreliable in reporting security issues, see for example this article, but upstream users do have to investigate each violation. So upgrading dependency ws will save a lot of people a lot of time.

[vadimdemedes]

Fixed in 3.2.0, thanks for reporting!