Major optimization refactor, across the board

+ enable lexical-scope everywhere (lexical-binding = t): ~5-10% faster
  startup; ~5-20% general boost
+ reduce consing, function calls & garbage collection by preferring
  cl-loop & dolist over lambda closures (for mapc[ar], add-hook, and
  various cl-lib filter/map/reduce functions) -- where possible
+ prefer functions with dedicated opcodes, like assq (see byte-defop's
  in bytecomp.el for more)
+ prefer pcase & cond (faster) over cl-case
+ general refactor for code readability
+ ensure naming & style conventions are adhered to
+ appease byte-compiler by marking unused variables with underscore
+ defer minor mode activation to after-init, emacs-startup or
  window-setup hooks; a customization opportunity for users + ensures
  custom functionality won't interfere with startup.

modules/lang/purescript/config.el

@@ -1,25 +1,20 @@
-;;; lang/purescript/config.el
+;;; lang/purescript/config.el -*- lexical-binding: t; -*-
 
 (def-package! purescript-mode
   :mode "\\.purs$"
   :config
-  (add-hook! 'purescript-mode-hook #'flycheck-mode)
-  (add-hook! 'purescript-mode-hook #'company-mode)
-  (add-hook! 'purescript-mode-hook #'purescript-indentation-mode)
-  (add-hook! 'purescript-mode-hook #'rainbow-delimiters-mode)
-  (load "purescript-mode-autoloads" nil t)
-)
+  (add-hook! 'purescript-mode-hook
+    #'(flycheck-mode purescript-indentation-mode rainbow-delimiters-mode))
+
+  (load "purescript-mode-autoloads" nil t))
 
 ;; (def-package! flycheck-purescript
 ;;   :after purescript-mode
 ;;   :config
-;;   (add-hook! 'flycheck-mode-hook #'flycheck-purescript-setup)
-;; )
+;;   (add-hook 'flycheck-mode-hook #'flycheck-purescript-setup))
 
 (def-package! psc-ide
   :after purescript-mode
   :config
-  (require 'psc-ide)
-  (add-hook! 'purescript-mode-hook #'psc-ide-mode)
-)
+  (add-hook 'purescript-mode-hook #'psc-ide-mode))