Fix cookie authentication support for WebSocket

[Shiranuit]

What does this PR do ?

This PR change the behaviour of the websocket's connect method to call HttpProtocol.connect() if the support of cookieAuthentication is enabled.
Without that the HttpProtocol routes are not constructed, causing it to not send the payloads.

How should this be manually tested?

npm run test

Other changes

Correction of a wrong statement in the cookieAuth option of the Kuzzle constructor.

[codecov]

Codecov Report

Merging #635 (c1c6ecf) into master (f0beacc) will increase coverage by 0.03%.
The diff coverage is 100.00%.

❗ Current head c1c6ecf differs from pull request most recent head 1a626f8. Consider uploading reports for the commit 1a626f8 to get more accurate results

@@            Coverage Diff             @@
##           master     #635      +/-   ##
==========================================
+ Coverage   86.15%   86.18%   +0.03%     
==========================================
  Files          34       34              
  Lines        1589     1593       +4     
  Branches      279      280       +1     
==========================================
+ Hits         1369     1373       +4     
  Misses        162      162              
  Partials       58       58              

Impacted Files	Coverage Δ
src/protocols/WebSocket.ts	80.50% <100.00%> (+0.68%)	⬆️

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[scottinet]

Missing package version bump (run npm version patch and commit the changes)