Remove mode requirements, just mention them

lsp-haskell.el

@@ -1,7 +1,7 @@
 ;;; lsp-haskell.el --- Haskell support for lsp-mode -*- lexical-binding: t; -*-
 
 ;; Version: 1.1
-;; Package-Requires: ((emacs "27.1") (lsp-mode "3.0") (haskell-mode "16.1"))
+;; Package-Requires: ((emacs "27.1") (lsp-mode "3.0"))
 ;; Keywords: haskell
 ;; URL: https://github.com/emacs-lsp/lsp-haskell
 
@@ -29,7 +29,6 @@
 ;;; Code:
 
 (require 'lsp-mode)
-(require 'haskell-mode)
 
 ;; ---------------------------------------------------------------------
 ;; Configuration
@@ -714,13 +713,14 @@ arguments are non-nullable booleans."
 (add-to-list 'lsp-language-id-configuration '(haskell-literate-mode . "haskell"))
 (add-to-list 'lsp-language-id-configuration '(haskell-tng-mode . "haskell"))
 (add-to-list 'lsp-language-id-configuration '(haskell-cabal-mode . "haskell"))
+(add-to-list 'lsp-language-id-configuration '(haskell-ng-mode . "haskell"))
 
 ;; Register the client itself
 (lsp-register-client
   (make-lsp--client
     :new-connection (lsp-stdio-connection (lambda () (lsp-haskell--server-command)))
     ;; Should run under haskell-mode, haskell-literate-mode and haskell-tng-mode. We need to list haskell-literate-mode even though it's a derived mode of haskell-mode.
-    :major-modes '(haskell-mode haskell-literate-mode haskell-tng-mode haskell-cabal-mode)
+    :major-modes '(haskell-mode haskell-literate-mode haskell-tng-mode haskell-cabal-mode haskell-ng-mode)
     ;; This is arbitrary.
     :server-id 'lsp-haskell
     ;; HLS does not currently send 'workspace/configuration' on startup (https://github.com/haskell/haskell-language-server/issues/2762),