fix(deps): update dependency socket.io-client to v2.3.1

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
socket.io-client	dependencies	patch	2.3.0 -> 2.3.1

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Release Notes

Automattic/socket.io-client

v2.3.1

Compare Source

The debug dependency has been reverted to ~3.1.0, as the newer versions contains ES6 syntax which breaks in IE
browsers.

Please note that this only applied to users that bundle the Socket.IO client in their application, with webpack for
example, as the "official" bundles (in the dist/ folder) were already transpiled with babel.

For webpack users, you can also take a look at the webpack-remove-debug
plugin.

Bug Fixes

• fix reconnection after opening socket asynchronously (#​1253) (050108b)

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