svelte-language-server uses incorrect binary name

[diamondburned]

Currently, svelte-language-server is set up to search for a svelte-language-server binary and will install a svelte-language-server wrapper script if the user prompts the plugin to download the LSP:

https://github.com/mattn/vim-lsp-settings/blob/b986f8c10056faf289d692ea816bfc22b780e425/installer/install-svelte-language-server.sh#L5-L6

https://github.com/mattn/vim-lsp-settings/blob/b986f8c10056faf289d692ea816bfc22b780e425/settings/svelte-language-server.vim#L5

This, however, is not what svelte-language-server names its LSP server. Instead, svelte-language-server installs svelteserver to node_modules/.bin. As a result, the plugin can never find the actual LSP server binary when it's installed properly.

In other words, the only way to have working Svelte LSP is to install it globally using vim-lsp-settings' supplied shell script instead of using the locally/project-installed svelteserver binary.