fix: socket-io client must only use websocket transport

[zone117x]

Closes #1885

Ensure only websocket transport is used in the socket-io client. This fixes connectivity when using a load-balanced API endpoint that doesn't use sticky sessions.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 72.43%. Comparing base (7d3444b) to head (8dc75ad).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #1976 +/- ## =========================================== + Coverage 72.39% 72.43% +0.03% =========================================== Files 94 94 Lines 12579 12579 Branches 2873 2932 +59 =========================================== + Hits 9106 9111 +5 + Misses 3455 3450 -5 Partials 18 18 ```

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:tada: This PR is included in version 7.11.0-beta.7 :tada:

The release is available on:

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• npm package (@beta dist-tag)
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[blockstack-devops]

:tada: This PR is included in version 7.11.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• npm package (@latest dist-tag)
• GitHub release

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