Lsp-mode sends per-project config to Serenata incorrectly

[apergos]

lsp-php.el , in lsp-serenata-init-options sends the config settings in a group labelled "config", but Serenata expects it to be labelled "configuration", so per-project configuration never works.

Versions:

• lsp-mode: master and 20201011.1353
• Serenata: master and 5.4.0

I verified this by creating a .dir-locals.el file in my project repo, adding the hack-local-variables hook, doing M-x debug-entry for lsp, and seeing the following sent:

   "initializationOptions": {
    "config": {
      "uris": [
        "file:///home/ariel/src/wmf/mediawiki/core/core"
      ],
      "indexDatabaseUri": "file:///home/ariel/.emacs.d/serenata-cache/mwcore-index.sqlite",
      "phpVersion": 7.3,
      "excludedPathExpressions": [
        "/.+Test.php$/"
      ],
      "fileExtensions": [
        "php"
      ]
    }

But I got the following error message from Serenata:

No explicit project configuration found, automatically generating one and using the system's temp folder to store the index database. (etc)

Digging around in Serenata, one finds the following:
https://gitlab.com/Serenata/Serenata/-/blob/master/src/UserInterface/JsonRpcQueueItemHandler/InitializeJsonRpcQueueItemHandler.php#L180

I then edited lsp-php.el locally to change the string to ":configuration", closed and restarted emacs with a php file from the project repo, and then Serenata re-indexed the project, writing the sqlite project index file into my specified location. Previously it had written the file into /tmp, which is the behavior when Serenata has no configuration information passed to it.

[kiennq]

Nice, can you open a PR for that?