Adding purescript-language-server to tools

guides/Error-Suggestions.md

@@ -11,10 +11,11 @@ ouput of the compiler, but in the JSON output in a machine-usable format.
 * [psc-ide-vim](https://github.com/FrigoEU/psc-ide-vim/blob/master/doc/psc-ide-vim.txt#L61)
 * [atom-ide-purescript](https://github.com/nwolverson/atom-ide-purescript#error-suggestions--quick-fix)
 * [vscode-ide-purescript](https://github.com/nwolverson/vscode-ide-purescript)
+* [purescript-language-server](https://github.com/nwolverson/purescript-language-server)
 
 ### Fixable issues
 
 Classes of issues with support for auto-fix suggestions:
 
 * Import warnings (e.g. remove unused imports, make import explicit)
-* Missing type annotation (top level type annotations and `_`)
+* Missing type annotation (top level type annotations and `_`)